#637BEB#637BEB

#637BEB is a light, vivid blue. Relative luminance 0.228; OKLCH L 62.0% C 0.170 H 271.5°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#637BEB
RGB	rgb(99, 123, 235)
HSL	hsl(229, 77%, 65%)
HSV	hsv(229, 58%, 92%)
CMYK	cmyk(57.9%, 47.7%, 0%, 7.8%)
CIE-LAB	lab(54.88, 24.05, -59.42)
CIE-LCH	lch(54.88, 64.10, 292.03°)
OKLab	oklab(62% 0.0046 -0.1697)
OKLCH	oklch(62% 0.17 271.5)
XYZ	xyz(27.2190, 22.8146, 81.5505)
Luminance	0.2282 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637BEB #EBD363

analogous

#63BFEB #637BEB #8F63EB

triadic

#637BEB #EB637B #7BEB63

tetradic

#637BEB #EB63BF #EBD363 #63EB8F

square

#637BEB #EB63BF #EBD363 #63EB8F

split-complementary

#637BEB #EB8F63 #BFEB63

monochromatic

#1835BC #2D4DE4 #637BEB #99A9F2 #CFD7F9

Accessibility & contrast

On white

3.77

#637BEB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#637BEB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637BEB

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637BEB	#FFFFFF	#000000	##000000
##637BEB	1.00	3.77	5.56	5.56
#FFFFFF	3.77	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#448AEF

Deuteranopia (green-blind)

#2E7EE9

Tritanopia (blue-blind)

#0094A8

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #637beb;
/* rgb */ color: rgb(99, 123, 235);
/* oklch */ color: oklch(62.0% 0.170 271.5);

Tailwind

colors: {
  custom: {
    50: '#9aa0f2',
    500: '#637beb',
    950: '#000000',
  },
}

SCSS

$custom: #637beb;
$custom-light: #9aa0f2;
$custom-dark: #000000;

JSON

{
  "hex": "#637beb",
  "rgb": {
    "r": 99,
    "g": 123,
    "b": 235
  },
  "hsl": {
    "h": 229.412,
    "s": 77.273,
    "l": 65.49
  },
  "oklch": {
    "l": 0.62001,
    "c": 0.16979,
    "h": 271.5
  },
  "luminance": 0.22817
}

Semantic roles & 50–950 ramp

primary

#637BEB

secondary

#ECE4BE

accent

#B50CDA

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0E17

muted

#7F7E85

Preview Lab

Preview with #637BEB

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

Preview Lab → · Contrast checker → · Palette generator →