#637FE8#637FE8
#637FE8 is a light, vivid blue. Relative luminance 0.237; OKLCH L 62.6% C 0.161 H 270.0°. Best body text is #000000 at 5.73:1 contrast (WCAG AA passes).
Color values
| HEX | #637FE8 |
|---|---|
| RGB | rgb(99, 127, 232) |
| HSL | hsl(227, 74%, 65%) |
| HSV | hsv(227, 57%, 91%) |
| CMYK | cmyk(57.3%, 45.3%, 0%, 9%) |
| CIE-LAB | lab(55.74, 20.65, -56.37) |
| CIE-LCH | lch(55.74, 60.03, 290.12°) |
| OKLab | oklab(62.6% 0.0001 -0.1607) |
| OKLCH | oklch(62.6% 0.161 270) |
| XYZ | xyz(27.2956, 23.6555, 79.4559) |
| Luminance | 0.2366 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Soft Blue
#6488EA
ΔE00 3.04
Cornflower
#6A79F7
ΔE00 3.39
Lightish Blue
#3D7AFD
ΔE00 4.38
Dodger Blue
#3E82FC
ΔE00 5.00
Cornflower Blue
#5170D7
ΔE00 5.83
Clear Blue
#247AFD
ΔE00 5.87
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#637FE8 #E8CC63
analogous
#63C2E8 #637FE8 #8963E8
triadic
#637FE8 #E8637F #7FE863
tetradic
#637FE8 #E863C2 #E8CC63 #63E889
square
#637FE8 #E863C2 #E8CC63 #63E889
split-complementary
#637FE8 #E88963 #C2E863
monochromatic
#1B3BB6 #2E53E0 #637FE8 #98ABF0 #CED7F8
Accessibility & contrast
On white
3.66
#637FE8 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.73
#637FE8 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #637FE8
5.73:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##637FE8 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##637FE8 | 1.00 | 3.66 | 5.73 | 5.73 |
| #FFFFFF | 3.66 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.73 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.73 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#4E8CEC
Deuteranopia (green-blind)
#3C80E6
Tritanopia (blue-blind)
#0096A8
Achromatopsia (no color)
#868686
Design tokens & code
CSS
--color: #637fe8; /* rgb */ color: rgb(99, 127, 232); /* oklch */ color: oklch(62.6% 0.161 270.0);
Tailwind
colors: {
custom: {
50: '#99a3f0',
500: '#637fe8',
950: '#000000',
},
}SCSS
$custom: #637fe8; $custom-light: #99a3f0; $custom-dark: #000000;
JSON
{
"hex": "#637fe8",
"rgb": {
"r": 99,
"g": 127,
"b": 232
},
"hsl": {
"h": 227.368,
"s": 74.302,
"l": 64.902
},
"oklch": {
"l": 0.626,
"c": 0.16072,
"h": 270
},
"luminance": 0.23658
}Semantic roles & 50–950 ramp
primary
#637FE8
secondary
#EAE1BD
accent
#AC0FD6
background
#FAFAFE
surface
#F3F3FD
border
#CDCDD5
text
#0F0F16
muted
#7F7F84