#637CE9#637CE9

#637CE9 is a light, vivid blue. Relative luminance 0.230; OKLCH L 62.1% C 0.166 H 271.1°. Best body text is #000000 at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#637CE9
RGB	rgb(99, 124, 233)
HSL	hsl(229, 75%, 65%)
HSV	hsv(229, 58%, 91%)
CMYK	cmyk(57.5%, 46.8%, 0%, 8.6%)
CIE-LAB	lab(55.02, 22.79, -58.08)
CIE-LCH	lch(55.02, 62.39, 291.43°)
OKLab	oklab(62.07% 0.0033 -0.1658)
OKLCH	oklch(62.07% 0.166 271.1)
XYZ	xyz(27.0564, 22.9491, 80.0788)
Luminance	0.2295 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637CE9 #E9D063

analogous

#63BFE9 #637CE9 #8D63E9

triadic

#637CE9 #E9637C #7CE963

tetradic

#637CE9 #E963BF #E9D063 #63E98D

square

#637CE9 #E963BF #E9D063 #63E98D

split-complementary

#637CE9 #E98D63 #BFE963

monochromatic

#1A37B8 #2D4FE1 #637CE9 #99A9F1 #CED6F8

Accessibility & contrast

On white

3.76

#637CE9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.59

#637CE9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637CE9

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637CE9	#FFFFFF	#000000	##000000
##637CE9	1.00	3.76	5.59	5.59
#FFFFFF	3.76	1.00	21.00	21.00
#000000	5.59	21.00	1.00	1.00
##000000	5.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#488AED

Deuteranopia (green-blind)

#337EE7

Tritanopia (blue-blind)

#0094A7

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #637ce9;
/* rgb */ color: rgb(99, 124, 233);
/* oklch */ color: oklch(62.1% 0.166 271.1);

Tailwind

colors: {
  custom: {
    50: '#9aa1f1',
    500: '#637ce9',
    950: '#000000',
  },
}

SCSS

$custom: #637ce9;
$custom-light: #9aa1f1;
$custom-dark: #000000;

JSON

{
  "hex": "#637ce9",
  "rgb": {
    "r": 99,
    "g": 124,
    "b": 233
  },
  "hsl": {
    "h": 228.806,
    "s": 75.281,
    "l": 65.098
  },
  "oklch": {
    "l": 0.62069,
    "c": 0.16581,
    "h": 271.1
  },
  "luminance": 0.22951
}

Semantic roles & 50–950 ramp

primary

#637CE9

secondary

#EBE2BD

accent

#B20ED7

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0E17

muted

#7F7E85

Preview Lab

Preview with #637CE9

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

Preview Lab → · Contrast checker → · Palette generator →