#637CEB#637CEB
#637CEB is a light, vivid blue. Relative luminance 0.231; OKLCH L 62.2% C 0.169 H 271.2°. Best body text is #000000 at 5.61:1 contrast (WCAG AA passes).
Color values
| HEX | #637CEB |
|---|---|
| RGB | rgb(99, 124, 235) |
| HSL | hsl(229, 77%, 65%) |
| HSV | hsv(229, 58%, 92%) |
| CMYK | cmyk(57.9%, 47.2%, 0%, 7.8%) |
| CIE-LAB | lab(55.14, 23.44, -59.01) |
| CIE-LCH | lch(55.14, 63.49, 291.67°) |
| OKLab | oklab(62.2% 0.0036 -0.1685) |
| OKLCH | oklch(62.2% 0.169 271.2) |
| XYZ | xyz(27.3437, 23.0640, 81.5920) |
| Luminance | 0.2307 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 2.46
Soft Blue
#6488EA
ΔE00 4.07
Lightish Blue
#3D7AFD
ΔE00 4.38
Cornflower Blue
#5170D7
ΔE00 5.33
Dodger Blue
#3E82FC
ΔE00 5.57
Clear Blue
#247AFD
ΔE00 6.03
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#637CEB #EBD263
analogous
#63C0EB #637CEB #8E63EB
triadic
#637CEB #EB637C #7CEB63
tetradic
#637CEB #EB63C0 #EBD263 #63EB8E
square
#637CEB #EB63C0 #EBD263 #63EB8E
split-complementary
#637CEB #EB8E63 #C0EB63
monochromatic
#1836BC #2D4EE4 #637CEB #99AAF2 #CFD7F9
Accessibility & contrast
On white
3.74
#637CEB on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.61
#637CEB on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #637CEB
5.61:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##637CEB | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##637CEB | 1.00 | 3.74 | 5.61 | 5.61 |
| #FFFFFF | 3.74 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.61 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.61 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#468AEF
Deuteranopia (green-blind)
#307EE9
Tritanopia (blue-blind)
#0095A8
Achromatopsia (no color)
#848484
Design tokens & code
CSS
--color: #637ceb; /* rgb */ color: rgb(99, 124, 235); /* oklch */ color: oklch(62.2% 0.169 271.2);
Tailwind
colors: {
custom: {
50: '#9aa1f2',
500: '#637ceb',
950: '#000000',
},
}SCSS
$custom: #637ceb; $custom-light: #9aa1f2; $custom-dark: #000000;
JSON
{
"hex": "#637ceb",
"rgb": {
"r": 99,
"g": 124,
"b": 235
},
"hsl": {
"h": 228.971,
"s": 77.273,
"l": 65.49
},
"oklch": {
"l": 0.62197,
"c": 0.16854,
"h": 271.2
},
"luminance": 0.23066
}Semantic roles & 50–950 ramp
primary
#637CEB
secondary
#ECE3BE
accent
#B40CDA
background
#FAF9FE
surface
#F3F2FD
border
#CDCCD5
text
#0F0E17
muted
#7F7E85