#637FF5#637FF5
#637FF5 is a light, vivid blue. Relative luminance 0.244; OKLCH L 63.4% C 0.178 H 270.6°. Best body text is #000000 at 5.88:1 contrast (WCAG AA passes).
Color values
| HEX | #637FF5 |
|---|---|
| RGB | rgb(99, 127, 245) |
| HSL | hsl(228, 88%, 67%) |
| HSV | hsv(228, 60%, 96%) |
| CMYK | cmyk(59.6%, 48.2%, 0%, 3.9%) |
| CIE-LAB | lab(56.51, 24.89, -62.37) |
| CIE-LCH | lch(56.51, 67.15, 291.76°) |
| OKLab | oklab(63.43% 0.0017 -0.1783) |
| OKLCH | oklch(63.43% 0.178 270.6) |
| XYZ | xyz(29.2109, 24.4216, 89.5430) |
| Luminance | 0.2442 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 2.61
Soft Blue
#6488EA
ΔE00 3.35
Lightish Blue
#3D7AFD
ΔE00 4.21
Dodger Blue
#3E82FC
ΔE00 4.93
Clear Blue
#247AFD
ΔE00 5.92
Cornflower Blue
#5170D7
ΔE00 6.69
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#637FF5 #F5D963
analogous
#63C8F5 #637FF5 #9063F5
triadic
#637FF5 #F5637F #7FF563
tetradic
#637FF5 #F563C8 #F5D963 #63F590
square
#637FF5 #F563C8 #F5D963 #63F590
split-complementary
#637FF5 #F59063 #C8F563
monochromatic
#0D33D0 #2950F1 #637FF5 #9DAEF9 #D6DDFC
Accessibility & contrast
On white
3.57
#637FF5 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.88
#637FF5 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #637FF5
5.88:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##637FF5 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##637FF5 | 1.00 | 3.57 | 5.88 | 5.88 |
| #FFFFFF | 3.57 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.88 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.88 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#438EF9
Deuteranopia (green-blind)
#2781F3
Tritanopia (blue-blind)
#009AAE
Achromatopsia (no color)
#888888
Design tokens & code
CSS
--color: #637ff5; /* rgb */ color: rgb(99, 127, 245); /* oklch */ color: oklch(63.4% 0.178 270.6);
Tailwind
colors: {
custom: {
50: '#9ba3f9',
500: '#637ff5',
950: '#000000',
},
}SCSS
$custom: #637ff5; $custom-light: #9ba3f9; $custom-dark: #000000;
JSON
{
"hex": "#637ff5",
"rgb": {
"r": 99,
"g": 127,
"b": 245
},
"hsl": {
"h": 228.493,
"s": 87.952,
"l": 67.451
},
"oklch": {
"l": 0.6343,
"c": 0.17836,
"h": 270.6
},
"luminance": 0.24424
}Semantic roles & 50–950 ramp
primary
#637FF5
secondary
#F1E8C3
accent
#B901E5
background
#FAFAFF
surface
#F4F3FF
border
#CECDD7
text
#0F0F17
muted
#7F7F85