#51C0EA#51C0EA
#51C0EA is a light, moderate cyan. Relative luminance 0.454; OKLCH L 76.1% C 0.116 H 226.5°. Best body text is #000000 at 10.08:1 contrast (WCAG AA passes).
Color values
| HEX | #51C0EA |
|---|---|
| RGB | rgb(81, 192, 234) |
| HSL | hsl(196, 78%, 62%) |
| HSV | hsv(196, 65%, 92%) |
| CMYK | cmyk(65.4%, 17.9%, 0%, 8.2%) |
| CIE-LAB | lab(73.14, -18.87, -30.19) |
| CIE-LCH | lch(73.14, 35.60, 237.99°) |
| OKLab | oklab(76.07% -0.0801 -0.0844) |
| OKLCH | oklch(76.07% 0.116 226.5) |
| XYZ | xyz(37.0883, 45.3851, 84.6315) |
| Luminance | 0.4539 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Bright Sky Blue
#02CCFE
ΔE00 3.88
Deepskyblue
#00BFFF
ΔE00 4.58
Lightblue (survey)
#7BC8F6
ΔE00 5.26
Sky Blue
#87CEEB
ΔE00 5.98
Baby Blue
#89CFF0
ΔE00 6.07
Lightskyblue
#87CEFA
ΔE00 6.64
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#51C0EA #EA7B51
analogous
#51EAC8 #51C0EA #5173EA
triadic
#51C0EA #EA51C0 #C0EA51
tetradic
#51C0EA #C851EA #EA7B51 #73EA51
square
#51C0EA #C851EA #EA7B51 #73EA51
split-complementary
#51C0EA #EA5173 #EAC851
monochromatic
#1582AC #1BACE2 #51C0EA #88D4F1 #BEE8F7
Accessibility & contrast
On white
2.08
#51C0EA on #FFFFFF
AA ✗AA large ✗AAA ✗
On black
10.08
#51C0EA on #000000
AA ✓AA large ✓AAA ✓
Best text color
#000000 on #51C0EA
10.08:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##51C0EA | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##51C0EA | 1.00 | 2.08 | 10.08 | 10.08 |
| #FFFFFF | 2.08 | 1.00 | 21.00 | 21.00 |
| #000000 | 10.08 | 21.00 | 1.00 | 1.00 |
| ##000000 | 10.08 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#A9BCEC
Deuteranopia (green-blind)
#94ADEA
Tritanopia (blue-blind)
#00CCCE
Achromatopsia (no color)
#B4B4B4
Design tokens & code
CSS
--color: #51c0ea; /* rgb */ color: rgb(81, 192, 234); /* oklch */ color: oklch(76.1% 0.116 226.5);
Tailwind
colors: {
custom: {
50: '#92d3f0',
500: '#51c0ea',
950: '#000000',
},
}SCSS
$custom: #51c0ea; $custom-light: #92d3f0; $custom-dark: #000000;
JSON
{
"hex": "#51c0ea",
"rgb": {
"r": 81,
"g": 192,
"b": 234
},
"hsl": {
"h": 196.471,
"s": 78.462,
"l": 61.765
},
"oklch": {
"l": 0.76066,
"c": 0.11637,
"h": 226.5
},
"luminance": 0.45389
}Semantic roles & 50–950 ramp
primary
#51C0EA
secondary
#E8BFAF
accent
#440BDB
background
#F9FCFE
surface
#F2F9FD
border
#CCD2D5
text
#0E1416
muted
#7E8284