#637BFA#637BFA
#637BFA is a light, vivid blue. Relative luminance 0.237; OKLCH L 63.0% C 0.190 H 271.8°. Best body text is #000000 at 5.74:1 contrast (WCAG AA passes).
Color values
| HEX | #637BFA |
|---|---|
| RGB | rgb(99, 123, 250) |
| HSL | hsl(230, 94%, 68%) |
| HSV | hsv(230, 60%, 98%) |
| CMYK | cmyk(60.4%, 50.8%, 0%, 2%) |
| CIE-LAB | lab(55.80, 28.94, -66.26) |
| CIE-LCH | lch(55.80, 72.31, 293.60°) |
| OKLab | oklab(63% 0.0061 -0.1899) |
| OKLCH | oklch(63% 0.19 271.8) |
| XYZ | xyz(29.4781, 23.7183, 93.4486) |
| Luminance | 0.2372 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 1.42
Lightish Blue
#3D7AFD
ΔE00 4.45
Soft Blue
#6488EA
ΔE00 4.82
Dodger Blue
#3E82FC
ΔE00 5.84
Clear Blue
#247AFD
ΔE00 6.30
Cornflower Blue
#5170D7
ΔE00 6.43
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#637BFA #FAE263
analogous
#63C6FA #637BFA #9663FA
triadic
#637BFA #FA637B #7BFA63
tetradic
#637BFA #FA63C6 #FAE263 #63FA96
square
#637BFA #FA63C6 #FAE263 #63FA96
split-complementary
#637BFA #FA9663 #C6FA63
monochromatic
#0729DC #2849F8 #637BFA #9EADFC #DADFFE
Accessibility & contrast
On white
3.66
#637BFA on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.74
#637BFA on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #637BFA
5.74:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##637BFA | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##637BFA | 1.00 | 3.66 | 5.74 | 5.74 |
| #FFFFFF | 3.66 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.74 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.74 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#328DFF
Deuteranopia (green-blind)
#007FF7
Tritanopia (blue-blind)
#0098AF
Achromatopsia (no color)
#868686
Design tokens & code
CSS
--color: #637bfa; /* rgb */ color: rgb(99, 123, 250); /* oklch */ color: oklch(63.0% 0.190 271.8);
Tailwind
colors: {
custom: {
50: '#9ca0fd',
500: '#637bfa',
950: '#000000',
},
}SCSS
$custom: #637bfa; $custom-light: #9ca0fd; $custom-dark: #000000;
JSON
{
"hex": "#637bfa",
"rgb": {
"r": 99,
"g": 123,
"b": 250
},
"hsl": {
"h": 230.464,
"s": 93.789,
"l": 68.431
},
"oklch": {
"l": 0.62997,
"c": 0.18996,
"h": 271.8
},
"luminance": 0.23721
}Semantic roles & 50–950 ramp
primary
#637BFA
secondary
#F3ECC6
accent
#C100E6
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#0F0E18
muted
#7F7E86