#637AF4#637AF4
#637AF4 is a light, vivid blue. Relative luminance 0.231; OKLCH L 62.4% C 0.183 H 272.0°. Best body text is #000000 at 5.62:1 contrast (WCAG AA passes).
Color values
| HEX | #637AF4 |
|---|---|
| RGB | rgb(99, 122, 244) |
| HSL | hsl(230, 87%, 67%) |
| HSV | hsv(230, 59%, 96%) |
| CMYK | cmyk(59.4%, 50%, 0%, 4.3%) |
| CIE-LAB | lab(55.18, 27.59, -63.95) |
| CIE-LCH | lch(55.18, 69.65, 293.33°) |
| OKLab | oklab(62.4% 0.0065 -0.1831) |
| OKLCH | oklch(62.4% 0.183 272) |
| XYZ | xyz(28.4288, 23.1011, 88.5312) |
| Luminance | 0.2310 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 1.38
Lightish Blue
#3D7AFD
ΔE00 4.46
Soft Blue
#6488EA
ΔE00 4.91
Cornflower Blue
#5170D7
ΔE00 5.72
Dodger Blue
#3E82FC
ΔE00 5.99
Clear Blue
#247AFD
ΔE00 6.27
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#637AF4 #F4DD63
analogous
#63C2F4 #637AF4 #9563F4
triadic
#637AF4 #F4637A #7AF463
tetradic
#637AF4 #F463C2 #F4DD63 #63F495
square
#637AF4 #F463C2 #F4DD63 #63F495
split-complementary
#637AF4 #F49563 #C2F463
monochromatic
#0F2DCE #2A49F0 #637AF4 #9CABF8 #D5DBFC
Accessibility & contrast
On white
3.74
#637AF4 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.62
#637AF4 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #637AF4
5.62:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##637AF4 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##637AF4 | 1.00 | 3.74 | 5.62 | 5.62 |
| #FFFFFF | 3.74 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.62 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.62 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#378BF8
Deuteranopia (green-blind)
#147EF1
Tritanopia (blue-blind)
#0096AC
Achromatopsia (no color)
#848484
Design tokens & code
CSS
--color: #637af4; /* rgb */ color: rgb(99, 122, 244); /* oklch */ color: oklch(62.4% 0.183 272.0);
Tailwind
colors: {
custom: {
50: '#9ba0f8',
500: '#637af4',
950: '#000000',
},
}SCSS
$custom: #637af4; $custom-light: #9ba0f8; $custom-dark: #000000;
JSON
{
"hex": "#637af4",
"rgb": {
"r": 99,
"g": 122,
"b": 244
},
"hsl": {
"h": 230.483,
"s": 86.826,
"l": 67.255
},
"oklch": {
"l": 0.62402,
"c": 0.18319,
"h": 272
},
"luminance": 0.23103
}Semantic roles & 50–950 ramp
primary
#637AF4
secondary
#F0E9C3
accent
#C002E3
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#0F0E17
muted
#7F7E85