#66C3EA#66C3EA
#66C3EA is a light, moderate cyan. Relative luminance 0.478; OKLCH L 77.5% C 0.104 H 227.8°. Best body text is #000000 at 10.56:1 contrast (WCAG AA passes).
Color values
| HEX | #66C3EA |
|---|---|
| RGB | rgb(102, 195, 234) |
| HSL | hsl(198, 76%, 66%) |
| HSV | hsv(198, 56%, 92%) |
| CMYK | cmyk(56.4%, 16.7%, 0%, 8.2%) |
| CIE-LAB | lab(74.69, -16.73, -27.75) |
| CIE-LCH | lch(74.69, 32.40, 238.92°) |
| OKLab | oklab(77.5% -0.0701 -0.0772) |
| OKLCH | oklch(77.5% 0.104 227.8) |
| XYZ | xyz(39.8402, 47.7918, 84.9512) |
| Luminance | 0.4780 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Lightblue (survey)
#7BC8F6
ΔE00 3.92
Sky Blue
#87CEEB
ΔE00 4.36
Baby Blue
#89CFF0
ΔE00 4.36
Bright Sky Blue
#02CCFE
ΔE00 4.61
Lightskyblue
#87CEFA
ΔE00 5.12
Deepskyblue
#00BFFF
ΔE00 5.50
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#66C3EA #EA8D66
analogous
#66EACF #66C3EA #6681EA
triadic
#66C3EA #EA66C3 #C3EA66
tetradic
#66C3EA #CF66EA #EA8D66 #81EA66
square
#66C3EA #CF66EA #EA8D66 #81EA66
split-complementary
#66C3EA #EA6681 #EACF66
monochromatic
#1A8CBC #30AEE3 #66C3EA #9CD8F1 #D2EDF9
Accessibility & contrast
On white
1.99
#66C3EA on #FFFFFF
AA ✗AA large ✗AAA ✗
On black
10.56
#66C3EA on #000000
AA ✓AA large ✓AAA ✓
Best text color
#000000 on #66C3EA
10.56:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##66C3EA | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##66C3EA | 1.00 | 1.99 | 10.56 | 10.56 |
| #FFFFFF | 1.99 | 1.00 | 21.00 | 21.00 |
| #000000 | 10.56 | 21.00 | 1.00 | 1.00 |
| ##000000 | 10.56 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#AFC0EC
Deuteranopia (green-blind)
#9CB2EA
Tritanopia (blue-blind)
#00CED0
Achromatopsia (no color)
#B8B8B8
Design tokens & code
CSS
--color: #66c3ea; /* rgb */ color: rgb(102, 195, 234); /* oklch */ color: oklch(77.5% 0.104 227.8);
Tailwind
colors: {
custom: {
50: '#9cd5f0',
500: '#66c3ea',
950: '#000000',
},
}SCSS
$custom: #66c3ea; $custom-light: #9cd5f0; $custom-dark: #000000;
JSON
{
"hex": "#66c3ea",
"rgb": {
"r": 102,
"g": 195,
"b": 234
},
"hsl": {
"h": 197.727,
"s": 75.862,
"l": 65.882
},
"oklch": {
"l": 0.77496,
"c": 0.10435,
"h": 227.8
},
"luminance": 0.47796
}Semantic roles & 50–950 ramp
primary
#66C3EA
secondary
#ECCDC0
accent
#490DD8
background
#FAFDFE
surface
#F4FAFD
border
#CED3D5
text
#0F1416
muted
#7F8384