#51A1E9#51A1E9
#51A1E9 is a light, vivid cyan. Relative luminance 0.331; OKLCH L 69.0% C 0.132 H 248.1°. Best body text is #000000 at 7.62:1 contrast (WCAG AA passes).
Color values
| HEX | #51A1E9 |
|---|---|
| RGB | rgb(81, 161, 233) |
| HSL | hsl(208, 78%, 62%) |
| HSV | hsv(208, 65%, 91%) |
| CMYK | cmyk(65.2%, 30.9%, 0%, 8.6%) |
| CIE-LAB | lab(64.26, -2.35, -43.47) |
| CIE-LCH | lch(64.26, 43.53, 266.90°) |
| OKLab | oklab(69% -0.0494 -0.1229) |
| OKLCH | oklch(69% 0.132 248.1) |
| XYZ | xyz(30.8407, 33.1191, 81.8423) |
| Luminance | 0.3312 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Azure (survey)
#069AF3
ΔE00 3.55
Dodgerblue
#1E90FF
ΔE00 5.62
Dark Sky Blue
#448EE4
ΔE00 6.12
Cornflowerblue
#6495ED
ΔE00 6.47
Sky Blue (survey)
#75BBFD
ΔE00 7.53
Faded Blue
#658CBB
ΔE00 8.78
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#51A1E9 #E99951
analogous
#51E9E5 #51A1E9 #5155E9
triadic
#51A1E9 #E951A1 #A1E951
tetradic
#51A1E9 #E551E9 #E99951 #55E951
square
#51A1E9 #E551E9 #E99951 #55E951
split-complementary
#51A1E9 #E95155 #E9E551
monochromatic
#1664AA #1C84E0 #51A1E9 #87BEF0 #BEDCF7
Accessibility & contrast
On white
2.75
#51A1E9 on #FFFFFF
AA ✗AA large ✗AAA ✗
On black
7.62
#51A1E9 on #000000
AA ✓AA large ✓AAA ✓
Best text color
#000000 on #51A1E9
7.62:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##51A1E9 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##51A1E9 | 1.00 | 2.75 | 7.62 | 7.62 |
| #FFFFFF | 2.75 | 1.00 | 21.00 | 21.00 |
| #000000 | 7.62 | 21.00 | 1.00 | 1.00 |
| ##000000 | 7.62 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#81A4EC
Deuteranopia (green-blind)
#6C95E8
Tritanopia (blue-blind)
#00B2BB
Achromatopsia (no color)
#9C9C9C
Design tokens & code
CSS
--color: #51a1e9; /* rgb */ color: rgb(81, 161, 233); /* oklch */ color: oklch(69.0% 0.132 248.1);
Tailwind
colors: {
custom: {
50: '#90bcf0',
500: '#51a1e9',
950: '#000000',
},
}SCSS
$custom: #51a1e9; $custom-light: #90bcf0; $custom-dark: #000000;
JSON
{
"hex": "#51a1e9",
"rgb": {
"r": 81,
"g": 161,
"b": 233
},
"hsl": {
"h": 208.421,
"s": 77.551,
"l": 61.569
},
"oklch": {
"l": 0.69002,
"c": 0.13246,
"h": 248.1
},
"luminance": 0.33122
}Semantic roles & 50–950 ramp
primary
#51A1E9
secondary
#E7C9AF
accent
#6D0CDA
background
#F9FBFE
surface
#F2F6FD
border
#CCD0D5
text
#0E1216
muted
#7E8184