#637CF5#637CF5

#637CF5 is a light, vivid blue. Relative luminance 0.237; OKLCH L 62.9% C 0.182 H 271.5°. Best body text is #000000 at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#637CF5
RGB	rgb(99, 124, 245)
HSL	hsl(230, 88%, 67%)
HSV	hsv(230, 60%, 96%)
CMYK	cmyk(59.6%, 49.4%, 0%, 3.9%)
CIE-LAB	lab(55.74, 26.70, -63.59)
CIE-LCH	lch(55.74, 68.97, 292.78°)
OKLab	oklab(62.85% 0.0046 -0.182)
OKLCH	oklch(62.85% 0.182 271.5)
XYZ	xyz(28.8292, 23.6582, 89.4158)
Luminance	0.2366 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637CF5 #F5DC63

analogous

#63C5F5 #637CF5 #9363F5

triadic

#637CF5 #F5637C #7CF563

tetradic

#637CF5 #F563C5 #F5DC63 #63F593

square

#637CF5 #F563C5 #F5DC63 #63F593

split-complementary

#637CF5 #F59363 #C5F563

monochromatic

#0D2FD0 #294CF1 #637CF5 #9DACF9 #D6DDFC

Accessibility & contrast

On white

3.66

#637CF5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.73

#637CF5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637CF5

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637CF5	#FFFFFF	#000000	##000000
##637CF5	1.00	3.66	5.73	5.73
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.73	21.00	1.00	1.00
##000000	5.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B8CF9

Deuteranopia (green-blind)

#1B7FF2

Tritanopia (blue-blind)

#0098AD

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #637cf5;
/* rgb */ color: rgb(99, 124, 245);
/* oklch */ color: oklch(62.9% 0.182 271.5);

Tailwind

colors: {
  custom: {
    50: '#9ba1f9',
    500: '#637cf5',
    950: '#000000',
  },
}

SCSS

$custom: #637cf5;
$custom-light: #9ba1f9;
$custom-dark: #000000;

JSON

{
  "hex": "#637cf5",
  "rgb": {
    "r": 99,
    "g": 124,
    "b": 245
  },
  "hsl": {
    "h": 229.726,
    "s": 87.952,
    "l": 67.451
  },
  "oklch": {
    "l": 0.62851,
    "c": 0.18205,
    "h": 271.5
  },
  "luminance": 0.23661
}

Semantic roles & 50–950 ramp

primary

#637CF5

secondary

#F1E9C3

accent

#BE01E5

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0E17

muted

#7F7E85

Preview Lab

Preview with #637CF5

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →