#51A3DA#51A3DA
#51A3DA is a light, moderate cyan. Relative luminance 0.330; OKLCH L 68.7% C 0.114 H 240.6°. Best body text is #000000 at 7.60:1 contrast (WCAG AA passes).
Color values
| HEX | #51A3DA |
|---|---|
| RGB | rgb(81, 163, 218) |
| HSL | hsl(204, 65%, 59%) |
| HSV | hsv(204, 63%, 85%) |
| CMYK | cmyk(62.8%, 25.2%, 0%, 14.5%) |
| CIE-LAB | lab(64.16, -8.38, -35.34) |
| CIE-LCH | lch(64.16, 36.32, 256.66°) |
| OKLab | oklab(68.71% -0.056 -0.0993) |
| OKLCH | oklch(68.71% 0.114 240.6) |
| XYZ | xyz(29.1406, 33.0028, 71.1505) |
| Luminance | 0.3301 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Azure (survey)
#069AF3
ΔE00 4.84
Dodgerblue
#1E90FF
ΔE00 7.95
Dark Sky Blue
#448EE4
ΔE00 8.00
Sky Blue (survey)
#75BBFD
ΔE00 8.01
Cornflowerblue
#6495ED
ΔE00 8.73
Deepskyblue
#00BFFF
ΔE00 8.91
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#51A3DA #DA8851
analogous
#51DACD #51A3DA #515EDA
triadic
#51A3DA #DA51A3 #A3DA51
tetradic
#51A3DA #CD51DA #DA8851 #5EDA51
square
#51A3DA #CD51DA #DA8851 #5EDA51
split-complementary
#51A3DA #DA515E #DACD51
monochromatic
#1F6492 #2A86C4 #51A3DA #83BEE5 #B6D8EF
Accessibility & contrast
On white
2.76
#51A3DA on #FFFFFF
AA ✗AA large ✗AAA ✗
On black
7.60
#51A3DA on #000000
AA ✓AA large ✓AAA ✓
Best text color
#000000 on #51A3DA
7.60:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##51A3DA | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##51A3DA | 1.00 | 2.76 | 7.60 | 7.60 |
| #FFFFFF | 2.76 | 1.00 | 21.00 | 21.00 |
| #000000 | 7.60 | 21.00 | 1.00 | 1.00 |
| ##000000 | 7.60 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#8AA3DD
Deuteranopia (green-blind)
#7795D9
Tritanopia (blue-blind)
#00B1B6
Achromatopsia (no color)
#9B9B9B
Design tokens & code
CSS
--color: #51a3da; /* rgb */ color: rgb(81, 163, 218); /* oklch */ color: oklch(68.7% 0.114 240.6);
Tailwind
colors: {
custom: {
50: '#8ebee5',
500: '#51a3da',
950: '#000000',
},
}SCSS
$custom: #51a3da; $custom-light: #8ebee5; $custom-dark: #000000;
JSON
{
"hex": "#51a3da",
"rgb": {
"r": 81,
"g": 163,
"b": 218
},
"hsl": {
"h": 204.088,
"s": 64.929,
"l": 58.627
},
"oklch": {
"l": 0.68709,
"c": 0.11402,
"h": 240.6
},
"luminance": 0.33006
}Semantic roles & 50–950 ramp
primary
#51A3DA
secondary
#DEBEA8
accent
#8340E8
background
#F9FBFE
surface
#F2F6FC
border
#CCD0D5
text
#0D1216
muted
#7E8184