#37B8D4#37B8D4
#37B8D4 is a light, moderate cyan. Relative luminance 0.398; OKLCH L 72.6% C 0.115 H 215.8°. Best body text is #000000 at 8.97:1 contrast (WCAG AA passes).
Color values
| HEX | #37B8D4 |
|---|---|
| RGB | rgb(55, 184, 212) |
| HSL | hsl(191, 65%, 52%) |
| HSV | hsv(191, 74%, 83%) |
| CMYK | cmyk(74.1%, 13.2%, 0%, 16.9%) |
| CIE-LAB | lab(69.36, -25.25, -24.08) |
| CIE-LCH | lch(69.36, 34.89, 223.64°) |
| OKLab | oklab(72.58% -0.0931 -0.0672) |
| OKLCH | oklch(72.58% 0.115 215.8) |
| XYZ | xyz(30.5947, 39.8430, 68.3526) |
| Luminance | 0.3985 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Turquoise Blue
#06B1C4
ΔE00 4.44
Bright Sky Blue
#02CCFE
ΔE00 7.39
Neon Blue
#04D9FF
ΔE00 8.48
Sky Blue
#87CEEB
ΔE00 9.05
Deepskyblue
#00BFFF
ΔE00 9.38
Aqua Blue
#02D8E9
ΔE00 9.45
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#37B8D4 #D45337
analogous
#37D4A2 #37B8D4 #3769D4
triadic
#37B8D4 #D437B8 #B8D437
tetradic
#37B8D4 #A237D4 #D45337 #69D437
square
#37B8D4 #A237D4 #D45337 #69D437
split-complementary
#37B8D4 #D43769 #D4A237
monochromatic
#1A6677 #2492A9 #37B8D4 #69CADF #9CDCEA
Accessibility & contrast
On white
2.34
#37B8D4 on #FFFFFF
AA ✗AA large ✗AAA ✗
On black
8.97
#37B8D4 on #000000
AA ✓AA large ✓AAA ✓
Best text color
#000000 on #37B8D4
8.97:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##37B8D4 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##37B8D4 | 1.00 | 2.34 | 8.97 | 8.97 |
| #FFFFFF | 2.34 | 1.00 | 21.00 | 21.00 |
| #000000 | 8.97 | 21.00 | 1.00 | 1.00 |
| ##000000 | 8.97 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#A5B2D6
Deuteranopia (green-blind)
#8FA3D4
Tritanopia (blue-blind)
#00C2C1
Achromatopsia (no color)
#A9A9A9
Design tokens & code
CSS
--color: #37b8d4; /* rgb */ color: rgb(55, 184, 212); /* oklch */ color: oklch(72.6% 0.115 215.8);
Tailwind
colors: {
custom: {
50: '#85cde1',
500: '#37b8d4',
950: '#000000',
},
}SCSS
$custom: #37b8d4; $custom-light: #85cde1; $custom-dark: #000000;
JSON
{
"hex": "#37b8d4",
"rgb": {
"r": 55,
"g": 184,
"b": 212
},
"hsl": {
"h": 190.701,
"s": 64.609,
"l": 52.353
},
"oklch": {
"l": 0.72579,
"c": 0.11485,
"h": 215.8
},
"luminance": 0.39847
}Semantic roles & 50–950 ramp
primary
#37B8D4
secondary
#D69D91
accent
#5E40E8
background
#F8FCFD
surface
#F0F9FB
border
#CBD2D4
text
#0D1315
muted
#7D8283