#637EE8#637EE8

#637EE8 is a light, vivid blue. Relative luminance 0.234; OKLCH L 62.4% C 0.162 H 270.4°. Best body text is #000000 at 5.68:1 contrast (WCAG AA passes).

Color values

HEX	#637EE8
RGB	rgb(99, 126, 232)
HSL	hsl(228, 74%, 65%)
HSV	hsv(228, 57%, 91%)
CMYK	cmyk(57.3%, 45.7%, 0%, 9%)
CIE-LAB	lab(55.48, 21.26, -56.79)
CIE-LCH	lch(55.48, 60.63, 290.52°)
OKLab	oklab(62.4% 0.0011 -0.1619)
OKLCH	oklch(62.4% 0.162 270.4)
XYZ	xyz(27.1671, 23.3984, 79.4130)
Luminance	0.2340 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637EE8 #E8CD63

analogous

#63C0E8 #637EE8 #8B63E8

triadic

#637EE8 #E8637E #7EE863

tetradic

#637EE8 #E863C0 #E8CD63 #63E88B

square

#637EE8 #E863C0 #E8CD63 #63E88B

split-complementary

#637EE8 #E88B63 #C0E863

monochromatic

#1B3AB6 #2E52E0 #637EE8 #98AAF0 #CED6F8

Accessibility & contrast

On white

3.70

#637EE8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.68

#637EE8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637EE8

5.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637EE8	#FFFFFF	#000000	##000000
##637EE8	1.00	3.70	5.68	5.68
#FFFFFF	3.70	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)

#4D8BEC

Deuteranopia (green-blind)

#397FE6

Tritanopia (blue-blind)

#0096A8

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #637ee8;
/* rgb */ color: rgb(99, 126, 232);
/* oklch */ color: oklch(62.4% 0.162 270.4);

Tailwind

colors: {
  custom: {
    50: '#99a3f0',
    500: '#637ee8',
    950: '#000000',
  },
}

SCSS

$custom: #637ee8;
$custom-light: #99a3f0;
$custom-dark: #000000;

JSON

{
  "hex": "#637ee8",
  "rgb": {
    "r": 99,
    "g": 126,
    "b": 232
  },
  "hsl": {
    "h": 227.82,
    "s": 74.302,
    "l": 64.902
  },
  "oklch": {
    "l": 0.62401,
    "c": 0.16195,
    "h": 270.4
  },
  "luminance": 0.23401
}

Semantic roles & 50–950 ramp

primary

#637EE8

secondary

#EAE1BD

accent

#AE0FD6

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0F17

muted

#7F7E85

Preview Lab

Preview with #637EE8

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

Preview Lab → · Contrast checker → · Palette generator →