#637CF1#637CF1
#637CF1 is a light, vivid blue. Relative luminance 0.234; OKLCH L 62.6% C 0.177 H 271.4°. Best body text is #000000 at 5.68:1 contrast (WCAG AA passes).
Color values
| HEX | #637CF1 |
|---|---|
| RGB | rgb(99, 124, 241) |
| HSL | hsl(229, 84%, 67%) |
| HSV | hsv(229, 59%, 95%) |
| CMYK | cmyk(58.9%, 48.5%, 0%, 5.5%) |
| CIE-LAB | lab(55.50, 25.40, -61.77) |
| CIE-LCH | lch(55.50, 66.79, 292.35°) |
| OKLab | oklab(62.59% 0.0042 -0.1766) |
| OKLCH | oklch(62.59% 0.177 271.4) |
| XYZ | xyz(28.2252, 23.4166, 86.2345) |
| Luminance | 0.2342 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 1.97
Soft Blue
#6488EA
ΔE00 4.17
Lightish Blue
#3D7AFD
ΔE00 4.29
Dodger Blue
#3E82FC
ΔE00 5.52
Cornflower Blue
#5170D7
ΔE00 5.79
Clear Blue
#247AFD
ΔE00 6.04
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#637CF1 #F1D863
analogous
#63C3F1 #637CF1 #9163F1
triadic
#637CF1 #F1637C #7CF163
tetradic
#637CF1 #F163C3 #F1D863 #63F191
square
#637CF1 #F163C3 #F1D863 #63F191
split-complementary
#637CF1 #F19163 #C3F163
monochromatic
#1232C8 #2B4DEC #637CF1 #9BABF6 #D3DAFB
Accessibility & contrast
On white
3.69
#637CF1 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.68
#637CF1 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #637CF1
5.68:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##637CF1 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##637CF1 | 1.00 | 3.69 | 5.68 | 5.68 |
| #FFFFFF | 3.69 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.68 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.68 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#408BF5
Deuteranopia (green-blind)
#257FEF
Tritanopia (blue-blind)
#0097AB
Achromatopsia (no color)
#858585
Design tokens & code
CSS
--color: #637cf1; /* rgb */ color: rgb(99, 124, 241); /* oklch */ color: oklch(62.6% 0.177 271.4);
Tailwind
colors: {
custom: {
50: '#9ba1f6',
500: '#637cf1',
950: '#000000',
},
}SCSS
$custom: #637cf1; $custom-light: #9ba1f6; $custom-dark: #000000;
JSON
{
"hex": "#637cf1",
"rgb": {
"r": 99,
"g": 124,
"b": 241
},
"hsl": {
"h": 229.437,
"s": 83.529,
"l": 66.667
},
"oklch": {
"l": 0.62587,
"c": 0.17667,
"h": 271.4
},
"luminance": 0.23419
}Semantic roles & 50–950 ramp
primary
#637CF1
secondary
#EFE7C1
accent
#BA06E0
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#0F0E17
muted
#7F7E85