#51C4E9#51C4E9
#51C4E9 is a light, moderate cyan. Relative luminance 0.471; OKLCH L 76.9% C 0.115 H 222.7°. Best body text is #000000 at 10.42:1 contrast (WCAG AA passes).
Color values
| HEX | #51C4E9 |
|---|---|
| RGB | rgb(81, 196, 233) |
| HSL | hsl(195, 78%, 62%) |
| HSV | hsv(195, 65%, 91%) |
| CMYK | cmyk(65.2%, 15.9%, 0%, 8.6%) |
| CIE-LAB | lab(74.26, -21.24, -27.94) |
| CIE-LCH | lch(74.26, 35.09, 232.76°) |
| OKLab | oklab(76.95% -0.0845 -0.0779) |
| OKLCH | oklch(76.95% 0.115 222.7) |
| XYZ | xyz(37.8353, 47.1083, 84.1738) |
| Luminance | 0.4711 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Bright Sky Blue
#02CCFE
ΔE00 3.55
Sky Blue
#87CEEB
ΔE00 5.36
Baby Blue
#89CFF0
ΔE00 5.82
Neon Blue
#04D9FF
ΔE00 5.89
Lightblue (survey)
#7BC8F6
ΔE00 6.18
Deepskyblue
#00BFFF
ΔE00 6.25
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#51C4E9 #E97651
analogous
#51E9C2 #51C4E9 #5178E9
triadic
#51C4E9 #E951C4 #C4E951
tetradic
#51C4E9 #C251E9 #E97651 #78E951
square
#51C4E9 #C251E9 #E97651 #78E951
split-complementary
#51C4E9 #E95178 #E9C251
monochromatic
#1686AA #1CB1E0 #51C4E9 #87D6F0 #BEE9F7
Accessibility & contrast
On white
2.01
#51C4E9 on #FFFFFF
AA ✗AA large ✗AAA ✗
On black
10.42
#51C4E9 on #000000
AA ✓AA large ✓AAA ✓
Best text color
#000000 on #51C4E9
10.42:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##51C4E9 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##51C4E9 | 1.00 | 2.01 | 10.42 | 10.42 |
| #FFFFFF | 2.01 | 1.00 | 21.00 | 21.00 |
| #000000 | 10.42 | 21.00 | 1.00 | 1.00 |
| ##000000 | 10.42 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#AFC0EB
Deuteranopia (green-blind)
#99B0E9
Tritanopia (blue-blind)
#00D0D0
Achromatopsia (no color)
#B7B7B7
Design tokens & code
CSS
--color: #51c4e9; /* rgb */ color: rgb(81, 196, 233); /* oklch */ color: oklch(76.9% 0.115 222.7);
Tailwind
colors: {
custom: {
50: '#92d6f0',
500: '#51c4e9',
950: '#000000',
},
}SCSS
$custom: #51c4e9; $custom-light: #92d6f0; $custom-dark: #000000;
JSON
{
"hex": "#51c4e9",
"rgb": {
"r": 81,
"g": 196,
"b": 233
},
"hsl": {
"h": 194.605,
"s": 77.551,
"l": 61.569
},
"oklch": {
"l": 0.76946,
"c": 0.11498,
"h": 222.7
},
"luminance": 0.47112
}Semantic roles & 50–950 ramp
primary
#51C4E9
secondary
#E7BCAF
accent
#3E0CDA
background
#F9FDFE
surface
#F2FAFD
border
#CCD3D5
text
#0E1416
muted
#7E8384