#63B7EF#63B7EF
#63B7EF is a light, moderate cyan. Relative luminance 0.428; OKLCH L 74.9% C 0.115 H 239.9°. Best body text is #000000 at 9.55:1 contrast (WCAG AA passes).
Color values
| HEX | #63B7EF |
|---|---|
| RGB | rgb(99, 183, 239) |
| HSL | hsl(204, 81%, 66%) |
| HSV | hsv(204, 59%, 94%) |
| CMYK | cmyk(58.6%, 23.4%, 0%, 6.3%) |
| CIE-LAB | lab(71.38, -9.44, -35.57) |
| CIE-LCH | lch(71.38, 36.80, 255.14°) |
| OKLab | oklab(74.9% -0.0577 -0.0997) |
| OKLCH | oklch(74.9% 0.115 239.9) |
| XYZ | xyz(37.6532, 42.7481, 87.9115) |
| Luminance | 0.4275 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Sky Blue (survey)
#75BBFD
ΔE00 3.82
Lightblue (survey)
#7BC8F6
ΔE00 4.95
Deepskyblue
#00BFFF
ΔE00 5.33
Sky
#82CAFC
ΔE00 5.35
Lightskyblue
#87CEFA
ΔE00 6.57
Light Blue
#95D0FC
ΔE00 7.62
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#63B7EF #EF9B63
analogous
#63EFE1 #63B7EF #6371EF
triadic
#63B7EF #EF63B7 #B7EF63
tetradic
#63B7EF #E163EF #EF9B63 #71EF63
square
#63B7EF #E163EF #EF9B63 #71EF63
split-complementary
#63B7EF #EF6371 #EFE163
monochromatic
#147DC4 #2B9DE9 #63B7EF #9BD1F5 #D2EAFA
Accessibility & contrast
On white
2.20
#63B7EF on #FFFFFF
AA ✗AA large ✗AAA ✗
On black
9.55
#63B7EF on #000000
AA ✓AA large ✓AAA ✓
Best text color
#000000 on #63B7EF
9.55:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##63B7EF | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##63B7EF | 1.00 | 2.20 | 9.55 | 9.55 |
| #FFFFFF | 2.20 | 1.00 | 21.00 | 21.00 |
| #000000 | 9.55 | 21.00 | 1.00 | 1.00 |
| ##000000 | 9.55 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#9EB7F2
Deuteranopia (green-blind)
#8BA9EE
Tritanopia (blue-blind)
#00C5CA
Achromatopsia (no color)
#AFAFAF
Design tokens & code
CSS
--color: #63b7ef; /* rgb */ color: rgb(99, 183, 239); /* oklch */ color: oklch(74.9% 0.115 239.9);
Tailwind
colors: {
custom: {
50: '#9accf4',
500: '#63b7ef',
950: '#000000',
},
}SCSS
$custom: #63b7ef; $custom-light: #9accf4; $custom-dark: #000000;
JSON
{
"hex": "#63b7ef",
"rgb": {
"r": 99,
"g": 183,
"b": 239
},
"hsl": {
"h": 204,
"s": 81.395,
"l": 66.275
},
"oklch": {
"l": 0.74898,
"c": 0.11518,
"h": 239.9
},
"luminance": 0.42752
}Semantic roles & 50–950 ramp
primary
#63B7EF
secondary
#EED2C0
accent
#5D08DE
background
#FAFCFE
surface
#F3F8FD
border
#CDD1D5
text
#0F1317
muted
#7F8285