#637ACA#637ACA

#637ACA is a mid, vivid blue. Relative luminance 0.208; OKLCH L 59.8% C 0.125 H 270.2°. Best body text is #000000 at 5.17:1 contrast (WCAG AA passes).

Color values

HEX	#637ACA
RGB	rgb(99, 122, 202)
HSL	hsl(227, 49%, 59%)
HSV	hsv(227, 51%, 79%)
CMYK	cmyk(51%, 39.6%, 0%, 20.8%)
CIE-LAB	lab(52.77, 14.09, -44.20)
CIE-LCH	lch(52.77, 46.39, 287.68°)
OKLab	oklab(59.79% 0.0004 -0.1251)
OKLCH	oklch(59.79% 0.125 270.2)
XYZ	xyz(22.7623, 20.8345, 58.6877)
Luminance	0.2084 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637ACA #CAB363

analogous

#63AECA #637ACA #8063CA

triadic

#637ACA #CA637A #7ACA63

tetradic

#637ACA #CA63AE #CAB363 #63CA80

square

#637ACA #CA63AE #CAB363 #63CA80

split-complementary

#637ACA #CA8063 #AECA63

monochromatic

#2D4185 #3D57B3 #637ACA #91A1DA #BEC8E9

Accessibility & contrast

On white

4.06

#637ACA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.17

#637ACA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637ACA

5.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637ACA	#FFFFFF	#000000	##000000
##637ACA	1.00	4.06	5.17	5.17
#FFFFFF	4.06	1.00	21.00	21.00
#000000	5.17	21.00	1.00	1.00
##000000	5.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A83CD

Deuteranopia (green-blind)

#4F7AC8

Tritanopia (blue-blind)

#358B98

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #637aca;
/* rgb */ color: rgb(99, 122, 202);
/* oklch */ color: oklch(59.8% 0.125 270.2);

Tailwind

colors: {
  custom: {
    50: '#95a0da',
    500: '#637aca',
    950: '#000000',
  },
}

SCSS

$custom: #637aca;
$custom-light: #95a0da;
$custom-dark: #000000;

JSON

{
  "hex": "#637aca",
  "rgb": {
    "r": 99,
    "g": 122,
    "b": 202
  },
  "hsl": {
    "h": 226.602,
    "s": 49.282,
    "l": 59.02
  },
  "oklch": {
    "l": 0.59787,
    "c": 0.12509,
    "h": 270.2
  },
  "luminance": 0.20836
}

Semantic roles & 50–950 ramp

primary

#637ACA

secondary

#D9D0B0

accent

#BA4FD9

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0E15

muted

#7E7E83

Preview Lab

Preview with #637ACA

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

Preview Lab → · Contrast checker → · Palette generator →