#638BFB#638BFB
#638BFB is a light, vivid blue. Relative luminance 0.281; OKLCH L 66.2% C 0.172 H 266.9°. Best body text is #000000 at 6.62:1 contrast (WCAG AA passes).
Color values
| HEX | #638BFB |
|---|---|
| RGB | rgb(99, 139, 251) |
| HSL | hsl(224, 95%, 69%) |
| HSV | hsv(224, 61%, 98%) |
| CMYK | cmyk(60.6%, 44.6%, 0%, 1.6%) |
| CIE-LAB | lab(59.96, 19.64, -60.14) |
| CIE-LCH | lch(59.96, 63.26, 288.08°) |
| OKLab | oklab(66.18% -0.0093 -0.1716) |
| OKLCH | oklch(66.18% 0.172 266.9) |
| XYZ | xyz(31.7849, 28.0802, 94.9931) |
| Luminance | 0.2808 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Soft Blue
#6488EA
ΔE00 2.09
Cornflowerblue
#6495ED
ΔE00 3.80
Dodger Blue
#3E82FC
ΔE00 4.39
Lightish Blue
#3D7AFD
ΔE00 5.88
Cornflower
#6A79F7
ΔE00 6.40
Faded Blue
#658CBB
ΔE00 6.54
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#638BFB #FBD363
analogous
#63D7FB #638BFB #8763FB
triadic
#638BFB #FB638B #8BFB63
tetradic
#638BFB #FB63D7 #FBD363 #63FB87
square
#638BFB #FB63D7 #FBD363 #63FB87
split-complementary
#638BFB #FB8763 #D7FB63
monochromatic
#063FDE #275FF9 #638BFB #9FB7FD #DAE4FE
Accessibility & contrast
On white
3.17
#638BFB on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
6.62
#638BFB on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #638BFB
6.62:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##638BFB | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##638BFB | 1.00 | 3.17 | 6.62 | 6.62 |
| #FFFFFF | 3.17 | 1.00 | 21.00 | 21.00 |
| #000000 | 6.62 | 21.00 | 1.00 | 1.00 |
| ##000000 | 6.62 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#5698FF
Deuteranopia (green-blind)
#3E8AF9
Tritanopia (blue-blind)
#00A4B7
Achromatopsia (no color)
#909090
Design tokens & code
CSS
--color: #638bfb; /* rgb */ color: rgb(99, 139, 251); /* oklch */ color: oklch(66.2% 0.172 266.9);
Tailwind
colors: {
custom: {
50: '#9cacfd',
500: '#638bfb',
950: '#000000',
},
}SCSS
$custom: #638bfb; $custom-light: #9cacfd; $custom-dark: #000000;
JSON
{
"hex": "#638bfb",
"rgb": {
"r": 99,
"g": 139,
"b": 251
},
"hsl": {
"h": 224.211,
"s": 95,
"l": 68.627
},
"oklch": {
"l": 0.66177,
"c": 0.1719,
"h": 266.9
},
"luminance": 0.28083
}Semantic roles & 50–950 ramp
primary
#638BFB
secondary
#F4E8C6
accent
#A900E6
background
#FAFAFF
surface
#F4F4FF
border
#CECED7
text
#0F1018
muted
#7F7F86