#637EED#637EED

#637EED is a light, vivid blue. Relative luminance 0.237; OKLCH L 62.7% C 0.169 H 270.6°. Best body text is #000000 at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#637EED
RGB	rgb(99, 126, 237)
HSL	hsl(228, 79%, 66%)
HSV	hsv(228, 58%, 93%)
CMYK	cmyk(58.2%, 46.8%, 0%, 7.1%)
CIE-LAB	lab(55.77, 22.88, -59.10)
CIE-LCH	lch(55.77, 63.38, 291.16°)
OKLab	oklab(62.72% 0.0018 -0.1688)
OKLCH	oklch(62.72% 0.169 270.6)
XYZ	xyz(27.8874, 23.6866, 83.2067)
Luminance	0.2369 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637EED #EDD263

analogous

#63C3ED #637EED #8D63ED

triadic

#637EED #ED637E #7EED63

tetradic

#637EED #ED63C3 #EDD263 #63ED8D

square

#637EED #ED63C3 #EDD263 #63ED8D

split-complementary

#637EED #ED8D63 #C3ED63

monochromatic

#1637C0 #2C51E7 #637EED #9AABF3 #D1D9FA

Accessibility & contrast

On white

3.66

#637EED on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.74

#637EED on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637EED

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637EED	#FFFFFF	#000000	##000000
##637EED	1.00	3.66	5.74	5.74
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.74	21.00	1.00	1.00
##000000	5.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#488CF1

Deuteranopia (green-blind)

#3280EB

Tritanopia (blue-blind)

#0097AA

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #637eed;
/* rgb */ color: rgb(99, 126, 237);
/* oklch */ color: oklch(62.7% 0.169 270.6);

Tailwind

colors: {
  custom: {
    50: '#9aa3f3',
    500: '#637eed',
    950: '#000000',
  },
}

SCSS

$custom: #637eed;
$custom-light: #9aa3f3;
$custom-dark: #000000;

JSON

{
  "hex": "#637eed",
  "rgb": {
    "r": 99,
    "g": 126,
    "b": 237
  },
  "hsl": {
    "h": 228.261,
    "s": 79.31,
    "l": 65.882
  },
  "oklch": {
    "l": 0.62718,
    "c": 0.16878,
    "h": 270.6
  },
  "luminance": 0.23689
}

Semantic roles & 50–950 ramp

primary

#637EED

secondary

#EDE4BF

accent

#B30ADC

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0F17

muted

#7F7E85

Preview Lab

Preview with #637EED

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

Preview Lab → · Contrast checker → · Palette generator →