#66C3EF#66C3EF
#66C3EF is a light, moderate cyan. Relative luminance 0.481; OKLCH L 77.7% C 0.108 H 230.9°. Best body text is #000000 at 10.62:1 contrast (WCAG AA passes).
Color values
| HEX | #66C3EF |
|---|---|
| RGB | rgb(102, 195, 239) |
| HSL | hsl(199, 81%, 67%) |
| HSV | hsv(199, 57%, 94%) |
| CMYK | cmyk(57.3%, 18.4%, 0%, 6.3%) |
| CIE-LAB | lab(74.88, -15.25, -30.17) |
| CIE-LCH | lch(74.88, 33.80, 243.18°) |
| OKLab | oklab(77.7% -0.0684 -0.0841) |
| OKLCH | oklch(77.7% 0.108 230.9) |
| XYZ | xyz(40.5686, 48.0832, 88.7877) |
| Luminance | 0.4809 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Lightblue (survey)
#7BC8F6
ΔE00 2.90
Lightskyblue
#87CEFA
ΔE00 4.39
Sky
#82CAFC
ΔE00 4.55
Baby Blue
#89CFF0
ΔE00 4.59
Deepskyblue
#00BFFF
ΔE00 4.61
Bright Sky Blue
#02CCFE
ΔE00 4.89
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#66C3EF #EF9266
analogous
#66EFD7 #66C3EF #667FEF
triadic
#66C3EF #EF66C3 #C3EF66
tetradic
#66C3EF #D766EF #EF9266 #7FEF66
square
#66C3EF #D766EF #EF9266 #7FEF66
split-complementary
#66C3EF #EF667F #EFD766
monochromatic
#158DC6 #2FADE9 #66C3EF #9DD9F5 #D5EEFB
Accessibility & contrast
On white
1.98
#66C3EF on #FFFFFF
AA ✗AA large ✗AAA ✗
On black
10.62
#66C3EF on #000000
AA ✓AA large ✓AAA ✓
Best text color
#000000 on #66C3EF
10.62:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##66C3EF | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##66C3EF | 1.00 | 1.98 | 10.62 | 10.62 |
| #FFFFFF | 1.98 | 1.00 | 21.00 | 21.00 |
| #000000 | 10.62 | 21.00 | 1.00 | 1.00 |
| ##000000 | 10.62 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#ADC0F1
Deuteranopia (green-blind)
#9AB2EE
Tritanopia (blue-blind)
#00CFD1
Achromatopsia (no color)
#B8B8B8
Design tokens & code
CSS
--color: #66c3ef; /* rgb */ color: rgb(102, 195, 239); /* oklch */ color: oklch(77.7% 0.108 230.9);
Tailwind
colors: {
custom: {
50: '#9cd5f4',
500: '#66c3ef',
950: '#000000',
},
}SCSS
$custom: #66c3ef; $custom-light: #9cd5f4; $custom-dark: #000000;
JSON
{
"hex": "#66c3ef",
"rgb": {
"r": 102,
"g": 195,
"b": 239
},
"hsl": {
"h": 199.27,
"s": 81.065,
"l": 66.863
},
"oklch": {
"l": 0.77703,
"c": 0.1084,
"h": 230.9
},
"luminance": 0.48087
}Semantic roles & 50–950 ramp
primary
#66C3EF
secondary
#EED1C2
accent
#4D08DD
background
#FAFDFE
surface
#F4FAFD
border
#CED3D5
text
#0F1417
muted
#7F8385