#637BEC#637BEC

#637BEC is a light, vivid blue. Relative luminance 0.229; OKLCH L 62.1% C 0.171 H 271.6°. Best body text is #000000 at 5.57:1 contrast (WCAG AA passes).

Color values

HEX	#637BEC
RGB	rgb(99, 123, 236)
HSL	hsl(229, 78%, 66%)
HSV	hsv(229, 58%, 93%)
CMYK	cmyk(58.1%, 47.9%, 0%, 7.5%)
CIE-LAB	lab(54.94, 24.37, -59.88)
CIE-LCH	lch(54.94, 64.65, 292.15°)
OKLab	oklab(62.07% 0.0047 -0.1711)
OKLCH	oklch(62.07% 0.171 271.6)
XYZ	xyz(27.3639, 22.8726, 82.3135)
Luminance	0.2288 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637BEC #ECD463

analogous

#63BFEC #637BEC #8F63EC

triadic

#637BEC #EC637B #7BEC63

tetradic

#637BEC #EC63BF #ECD463 #63EC8F

square

#637BEC #EC63BF #ECD463 #63EC8F

split-complementary

#637BEC #EC8F63 #BFEC63

monochromatic

#1734BE #2C4DE5 #637BEC #9AA9F3 #D0D7F9

Accessibility & contrast

On white

3.77

#637BEC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.57

#637BEC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637BEC

5.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637BEC	#FFFFFF	#000000	##000000
##637BEC	1.00	3.77	5.57	5.57
#FFFFFF	3.77	1.00	21.00	21.00
#000000	5.57	21.00	1.00	1.00
##000000	5.57	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#438AF0

Deuteranopia (green-blind)

#2C7EEA

Tritanopia (blue-blind)

#0095A8

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #637bec;
/* rgb */ color: rgb(99, 123, 236);
/* oklch */ color: oklch(62.1% 0.171 271.6);

Tailwind

colors: {
  custom: {
    50: '#9aa0f3',
    500: '#637bec',
    950: '#000000',
  },
}

SCSS

$custom: #637bec;
$custom-light: #9aa0f3;
$custom-dark: #000000;

JSON

{
  "hex": "#637bec",
  "rgb": {
    "r": 99,
    "g": 123,
    "b": 236
  },
  "hsl": {
    "h": 229.489,
    "s": 78.286,
    "l": 65.686
  },
  "oklch": {
    "l": 0.62066,
    "c": 0.17115,
    "h": 271.6
  },
  "luminance": 0.22875
}

Semantic roles & 50–950 ramp

primary

#637BEC

secondary

#ECE4BF

accent

#B60BDB

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0E17

muted

#7F7E85

Preview Lab

Preview with #637BEC

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

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