Shades are created by adding black to or removing lightness from a particular color. For #66efeb, its pure hue is 178.2° on the color wheel and its saturation is 81.1%, and its lightness is 66.9%. As the amount of black is added to this hue and we reduce its lightness, the result is increasingly darker shades tints. The palette given below provides 9 different shades of #66efeb, which — excluding black and our original color — range from #0d1e1d to #59d1ce.
#66efeb Color Information
Details | Shades, Tints, and Tones | Variations | Color Coordinates |
Color Schemes | HTML+CSS Examples | Coding & Programming | Color Blindness |
Accessibility | Related Colors
The hexadecimal value (hex value) of this color is #66efeb. In RGB, it consists of 40.0% Red, 93.7% Green, and 92.2% Blue. Likewise, in the CMYK color space, it consists of 57.3% Cyan, 0% Magenta, 1.7% Yellow, and 6.3% Black. On the color wheel, its Hue is found at 178.2°, with saturation of 81.1% and lightness of 66.9%. The decimal value for #66efeb is 6746091, and its nearest "web safe" color is #66ffff. In the RGB color space, the strongest component for #66efeb is green. In the CMYK color space, its strongest component is cyan. And in the RYB color space, its strongest component is blue.
The hexadecimal value (hex value) of this color is #66efeb. In RGB, it consists of 40.0% Red, 93.7% Green, and 92.2% Blue. Likewise, in the CMYK color space, it consists of 57.3% Cyan, 0% Magenta, 1.7% Yellow, and 6.3% Black. On the color wheel, its Hue is found at 178.2°, with saturation of 81.1% and lightness of 66.9%. The decimal value for #66efeb is 6746091, and its nearest "web safe" color is #66ffff. In the RGB color space, the strongest component for #66efeb is green. In the CMYK color space, its strongest component is cyan. And in the RYB color space, its strongest component is blue.
- HexHex code for this color
- NameThe common name of this color
- RGBRed, Green, Blue composition for this color
- RGB PercentPercent Red, Green, Blue composition for this color
- CMYCyan, Magenta, Yellow composition for this color
- CMYKCyan, Magenta, Yellow, Black composition for this color
- HSLHue, Saturation, Lightness combination for this color
- HSV (or HSB)Hue, Saturation, Brightness combination for this color
- XYZCIE 1931 color space XYZ coordinates for this color
- RYBRed, Yellow, Blue composition for this color
- DecimalDecimal representation of this color's hex code
- CIE-LABCIELAB color space coordinates for this color
- CIE-LCHCIE-LCH color space coordinates for this color (chroma, hue, etc.)
- CIE-LUVCIE-LUV color space coordinates for this color
- Hunter LabHunter-Lab color space coordinates for this color
- xyYCIE xyY color space coordinates for this color
- AndroidValue of this color in Android development
- Web SafeHex code of the nearest "web safe" version of this color
Last Updated: May 28, 2025
Tints of #66efeb
Tints are created by adding white or lightness to a particular color. For #66efeb, its pure hue is 178.2° on the color wheel and its saturation is 81.1%, and its lightness is 66.9%. As the amount of white (lightness) is added to this hue, the result is increasingly lighter tints. The following palette gives 9 different tints of #66efeb, which — excluding white and our original color — range from #79f1ee to #ecfdfd.
Tones of #66efeb
Tones are the result of adding gray to a pure hue. In the case of #66efeb, its pure hue is 178.2° on the color wheel and its saturation is 81.1%, so we increase this saturation to create more colorful tones, and decrease the saturation to create grayer tones. The palette shown below gives 9 different tones of #66efeb, which range from #ababab (the grayest / 0% saturation) to #56fffa (the most colorful / 100% saturation).
Variations of #66efeb
There are several ways to create color variations and premutations of #66efeb! For #66efeb, there are 6 variations of the color that can be created by swapping its Red, Green, and Blue color positions, of which 5 are different from our original color. Among these six variations, there are 6 unique colors including our original color, #66efeb. Click on these colors to learn more about them, too!
Color Coordinates of #66efeb
This color, #66efeb, consists of 40.0% Red, 93.7% Green, and 92.2% Blue, resulting in color coordinates Red = 102, Green = 239, Blue = 235. Likewise, the CMYK color space composition for #66efeb is 57.3% Cyan, 0% Magenta, 1.7% Yellow, and 6.3% Black. These values are shown in the following charts and tables.
R40.0%
C57.3%
G93.7%
M0.0%
B92.2%
Y1.7%
K6.3%
| Color Base | R (Red) | G (Green) | B (Blue) |
|---|---|---|---|
| Decimal | 102 | 239 | 235 |
| Octal | 146 | 357 | 353 |
| Hexa | #66 | #ef | #eb |
| Binary | 01100110 | 11101111 | 11101011 |
| Color Base | C (Cyan) | M (Magenta) | Y (Yellow) | Y (Black) |
|---|---|---|---|---|
| Decimal | 57 | 0 | 1 | 6 |
| Octal | 71 | 0 | 1 | 6 |
| Hexa | #39 | #00 | #01 | #06 |
| Binary | 00111001 | 00000000 | 00000001 | 00000110 |
Analogous Colors of #66efeb
Analogous colors are located 30 degrees away from a color's hue on the color wheel. For #66efeb — which has hue 178.2° — its analogous colors are located at 148.2° and 208.2° on the color wheel, with the same saturation and lightness as #66efeb.
Triadic Colors of #66efeb
Triadic colors are located 120 degrees away from a color's hue on the color wheel, which means the original color and its triadic colors are equidistant from one another on the color wheel and form a triangle. For #66efeb — which has hue 178.2° — its triadic colors are located at 58.2° and 298.2° on the color wheel, with the same saturation and lightness as #66efeb.
Complementary Color of #66efeb
A complementary color is located opposite a color on the color wheel (180 degrees away). For #66efeb — which has hue 178.2° — its complementary color is located at 358.2° on the color wheel, with the same saturation and lightness as #66efeb.
Split Complementary Colors of #66efeb
Split complementary colors are the analogs of a color's complement, which places them 210 degrees away on the color wheel from an original color. For #66efeb — which has hue 178.2° — its split complementary colors its split complementary colors are located at 28.2° and 328.2° on the color wheel, with the same saturation and lightness as #66efeb.
Tetradic Colors of #66efeb
Tetradic colors are two sets of complementary colors on either side of a color wheel from each other, forming a rectangle on the color wheel. For #66efeb — which has hue 178.2° — its tetradic colors are located at 88.2°, 178.2°, 268.2°, and 358.2° on the color wheel, with the same saturation and lightness as #66efeb.
Monochromatic Colors of #66efeb
Monochromatic colors are colors that share a common hue but that have different saturations and lightness. For #66efeb, we show 9 different monochromatic colors of it, ranging from #26dbd6 — (which has very low saturation and very low lightness) — to #affbf9 (which has a very high saturation and very high lightness).
HTML+CSS Examples & Previews of #66efeb
We want to make getting started with #66efeb on your website fast and easy! Below are 8 examples of how to integrate #66efeb into a website using HTML+CSS. These examples include showing how #66efeb can be used to color text, backgrounds, shadows, and borders, as well as how it can be used as a solid fill or gradient fill for rectangles. These examples principally make use of <span> and <div> tags, although the CSS shown in particular can be repurposed to make use of #66efeb with other HTML elements.
#66efeb Foreground / Text Color
The color of this text is #66efeb.
<span style="color: #66efeb;">The color of this text is #66efeb.</span>#66efeb Background Color
The background color for this text is #66efeb.
<div style="background-color: #66efeb; width:100%; height:100%; display: flex; justify-content: center; align-items: center;">The background color for this text is #66efeb.</div>#66efeb Text Shadow Color
This color for the shadow of this text is #66efeb.
<span style="text-shadow: 3px 3px 3px #66efeb;">This color for the shadow of this text is #66efeb.</span>#66efeb Border Color
This is a div with border color #66efeb.
<div style="border: #66efeb 4px solid;width:100%; height:100%; display: flex; justify-content: center; align-items: center;">This is a div with border color #66efeb.</div>#66efeb Color Rectangle on a White Background
This is a rectangle of color #66efeb on a white background.
<div style="background-color: #ffffff; padding: 60px; width:100%; height: 100%;"><div style="background-color: #66efeb; width:100%; height:100%; padding: 10px; display: flex; justify-content: center; align-items: center;">This is a rectangle of color #66efeb on a white background.</div></div>#66efeb Color Rectangle on a Black Background
This is a rectangle of color #66efeb on a black background.
<div style="background-color: #000000; padding: 60px; width:100%; height: 100%;"><div style="background-color: #66efeb; width:100%; height:100%; padding: 10px; display: flex; justify-content: center; align-items: center;">This is a rectangle of color #66efeb on a black background.</div></div>Gradient from #66efeb to White
This is a gradient from #66efeb to white.
<div style="background: -webkit-linear-gradient(left,#66efeb,white); /* Firefox */ background: linear-gradient(to right,#66efeb,white); /* Safari */ background: -o-linear-gradient(left,#66efeb,white); /* Opera */ background: -moz-linear-gradient(left,#66efeb,white); width:100%; height:100%; display: flex; justify-content: center; align-items: center;">This is a gradient from #66efeb to white.</div>Gradient from #66efeb to Black
This is a gradient from #66efeb to black.
<div style="background: -webkit-linear-gradient(left,#66efeb,black); /* Firefox */ background: linear-gradient(to right,#66efeb,black); /* Safari */ background: -o-linear-gradient(left,#66efeb,black); /* Opera */ background: -moz-linear-gradient(left,#66efeb,black); color: #ffffff; width:100%; height:100%; display: flex; justify-content: center; align-items: center;">This is a gradient from #66efeb to black.</div>Coding & Programming with #66efeb
In addition to using #66efeb on the web, we know you might want to use it in your mobile and desktop apps, too. Whatever your needs, the table below shows how to access #66efeb in the language and environment of your choice. These code snippets are principally the hexadecimal representation of #66efeb, or the RGB color coordinates for the same (Red = 102, Green = 239, Blue = 235). If you need details about the color coordinates of #66efeb in other color spaces, refer to these details as provided toward the top of this page.
| Language | Environment | Code Snippet |
|---|---|---|
| HTML + CSS (Hex Code) | Web | #66efeb |
| HTML + CSS (RGB Code) | Web | rgb(102, 239, 235) |
| CSS Background Color | Web | .myclass { background-color: #66efeb; } |
| CSS Foreground + Text Color | Web | .myclass { color: #66efeb; } |
| CSS Border Color | Web | .myclass { border: 2px solid #66efeb; } |
| Java | (Multi-platform) | new Color(102, 239, 235); |
| Python | (Multi-platform) | Color("#66efeb") |
| Swift | iOS | UIColor(red:102, green:239, blue:235, alpha:1.0000) |
| Objective-C (iOS) | iOS | [UIColor colorWithRed:102 green:239 blue:235 alpha:1.0000]; |
| OpenGL | (Graphics) | glColor3f(102f, 239f, 235f); |
| C# / .NET | Windows | Color.FromArgb(102, 239, 235); |
#66efeb Color Blindness
Not everyone can see #66efeb the same way. For those with color blindness, #66efeb might look very, very different. Here, we simulate eight examples of color blindness, and how #66efeb looks next to each one of them. In all cases, #66efeb is placed in a circle in the upper-left corner of each of the below boxes, with the color in the rest of those boxes signifying how #66efeb looks for someone with that type of color blindness. Many people will perceive close similarities between the colors in these boxes and the colors in the circles — with some noticing particular similarities. We offer this insight so that as you make choices about colors to use for your purposes, you can make an informed decision about whether #66efeb will be a good fit for everyone in your audience!
Trichromacy
Protanomaly
Affects 1 in 100 Men & 1 in 10,000 Women
Deuteranomaly
Affects 1 in 17 Men & 1 in 250 Women
Tritanomaly
Affects 1 in 10,000
Dichromacy
Protanopia
Affects 1 in 100, Mostly Men
Deuteranopia
Affects 1 in 100, Mostly Men
Tritanopia
Affects 1 in 100,000
Accessibility
Not Accessibility Recommended
We analyzed whether #66efeb is an accessible color when used as a text / foreground color against a white background. This analysis is based on the Web Content Accessibility Guidelines (WCAG) 2 Level issued by W3C. Based on this analysis, we calculate a contrast ratio against white of approximately 1.4:1 against white. Under both the AA and AAA level standards, this is not a high enough ratio to be considered accessible for either normal size or large text.