#637DCA#637DCA

#637DCA is a mid, vivid blue. Relative luminance 0.216; OKLCH L 60.4% C 0.121 H 268.5°. Best body text is #000000 at 5.32:1 contrast (WCAG AA passes).

Color values

HEX	#637DCA
RGB	rgb(99, 125, 202)
HSL	hsl(225, 49%, 59%)
HSV	hsv(225, 51%, 79%)
CMYK	cmyk(51%, 38.1%, 0%, 20.8%)
CIE-LAB	lab(53.58, 12.27, -42.91)
CIE-LCH	lch(53.58, 44.63, 285.96°)
OKLab	oklab(60.41% -0.0032 -0.1213)
OKLCH	oklch(60.41% 0.121 268.5)
XYZ	xyz(23.1364, 21.5826, 58.8124)
Luminance	0.2158 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637DCA #CAB063

analogous

#63B1CA #637DCA #7D63CA

triadic

#637DCA #CA637D #7DCA63

tetradic

#637DCA #CA63B1 #CAB063 #63CA7D

square

#637DCA #CA63B1 #CAB063 #63CA7D

split-complementary

#637DCA #CA7D63 #B1CA63

monochromatic

#2D4485 #3D5BB3 #637DCA #91A3DA #BEC9E9

Accessibility & contrast

On white

3.95

#637DCA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.32

#637DCA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637DCA

5.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637DCA	#FFFFFF	#000000	##000000
##637DCA	1.00	3.95	5.32	5.32
#FFFFFF	3.95	1.00	21.00	21.00
#000000	5.32	21.00	1.00	1.00
##000000	5.32	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F85CD

Deuteranopia (green-blind)

#547CC8

Tritanopia (blue-blind)

#358D9A

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #637dca;
/* rgb */ color: rgb(99, 125, 202);
/* oklch */ color: oklch(60.4% 0.121 268.5);

Tailwind

colors: {
  custom: {
    50: '#95a2da',
    500: '#637dca',
    950: '#000000',
  },
}

SCSS

$custom: #637dca;
$custom-light: #95a2da;
$custom-dark: #000000;

JSON

{
  "hex": "#637dca",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 202
  },
  "hsl": {
    "h": 224.854,
    "s": 49.282,
    "l": 59.02
  },
  "oklch": {
    "l": 0.60414,
    "c": 0.12135,
    "h": 268.5
  },
  "luminance": 0.21584
}

Semantic roles & 50–950 ramp

primary

#637DCA

secondary

#D9CEB0

accent

#B64FD9

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0F15

muted

#7E7E83

Preview Lab

Preview with #637DCA

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

Preview Lab → · Contrast checker → · Palette generator →