#637BF7#637BF7
#637BF7 is a light, vivid blue. Relative luminance 0.235; OKLCH L 62.8% C 0.186 H 271.8°. Best body text is #000000 at 5.71:1 contrast (WCAG AA passes).
Color values
| HEX | #637BF7 |
|---|---|
| RGB | rgb(99, 123, 247) |
| HSL | hsl(230, 90%, 68%) |
| HSV | hsv(230, 60%, 97%) |
| CMYK | cmyk(59.9%, 50.2%, 0%, 3.1%) |
| CIE-LAB | lab(55.62, 27.96, -64.91) |
| CIE-LCH | lch(55.62, 70.68, 293.31°) |
| OKLab | oklab(62.79% 0.0058 -0.1859) |
| OKLCH | oklch(62.79% 0.186 271.8) |
| XYZ | xyz(29.0115, 23.5316, 90.9909) |
| Luminance | 0.2353 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 1.45
Lightish Blue
#3D7AFD
ΔE00 4.39
Soft Blue
#6488EA
ΔE00 4.69
Dodger Blue
#3E82FC
ΔE00 5.79
Cornflower Blue
#5170D7
ΔE00 6.15
Clear Blue
#247AFD
ΔE00 6.22
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#637BF7 #F7DF63
analogous
#63C5F7 #637BF7 #9563F7
triadic
#637BF7 #F7637B #7BF763
tetradic
#637BF7 #F763C5 #F7DF63 #63F795
square
#637BF7 #F763C5 #F7DF63 #63F795
split-complementary
#637BF7 #F79563 #C5F763
monochromatic
#0B2CD5 #294AF4 #637BF7 #9DACFA #D7DEFD
Accessibility & contrast
On white
3.68
#637BF7 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.71
#637BF7 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #637BF7
5.71:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##637BF7 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##637BF7 | 1.00 | 3.68 | 5.71 | 5.71 |
| #FFFFFF | 3.68 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.71 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.71 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#368CFB
Deuteranopia (green-blind)
#0E7FF4
Tritanopia (blue-blind)
#0098AD
Achromatopsia (no color)
#858585
Design tokens & code
CSS
--color: #637bf7; /* rgb */ color: rgb(99, 123, 247); /* oklch */ color: oklch(62.8% 0.186 271.8);
Tailwind
colors: {
custom: {
50: '#9ca0fb',
500: '#637bf7',
950: '#000000',
},
}SCSS
$custom: #637bf7; $custom-light: #9ca0fb; $custom-dark: #000000;
JSON
{
"hex": "#637bf7",
"rgb": {
"r": 99,
"g": 123,
"b": 247
},
"hsl": {
"h": 230.27,
"s": 90.244,
"l": 67.843
},
"oklch": {
"l": 0.62794,
"c": 0.18596,
"h": 271.8
},
"luminance": 0.23534
}Semantic roles & 50–950 ramp
primary
#637BF7
secondary
#F2EAC4
accent
#C000E6
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#0F0E17
muted
#7F7E85