#637ABA#637ABA

#637ABA is a mid, moderate blue. Relative luminance 0.201; OKLCH L 58.9% C 0.102 H 268.2°. Best body text is #000000 at 5.02:1 contrast (WCAG AA passes).

Color values

HEX	#637ABA
RGB	rgb(99, 122, 186)
HSL	hsl(224, 39%, 56%)
HSV	hsv(224, 47%, 73%)
CMYK	cmyk(46.8%, 34.4%, 0%, 27.1%)
CIE-LAB	lab(51.97, 9.14, -36.31)
CIE-LCH	lch(51.97, 37.44, 284.13°)
OKLab	oklab(58.91% -0.0033 -0.1021)
OKLCH	oklch(58.91% 0.102 268.2)
XYZ	xyz(20.9652, 20.1156, 49.2228)
Luminance	0.2012 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637ABA #BAA363

analogous

#63A5BA #637ABA #7763BA

triadic

#637ABA #BA637A #7ABA63

tetradic

#637ABA #BA63A5 #BAA363 #63BA77

square

#637ABA #BA63A5 #BAA363 #63BA77

split-complementary

#637ABA #BA7763 #A5BA63

monochromatic

#324271 #455C9B #637ABA #8D9ECD #B8C2E0

Accessibility & contrast

On white

4.18

#637ABA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.02

#637ABA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637ABA

5.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637ABA	#FFFFFF	#000000	##000000
##637ABA	1.00	4.18	5.02	5.02
#FFFFFF	4.18	1.00	21.00	21.00
#000000	5.02	21.00	1.00	1.00
##000000	5.02	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6280BD

Deuteranopia (green-blind)

#5A78B9

Tritanopia (blue-blind)

#428791

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #637aba;
/* rgb */ color: rgb(99, 122, 186);
/* oklch */ color: oklch(58.9% 0.102 268.2);

Tailwind

colors: {
  custom: {
    50: '#94a0cf',
    500: '#637aba',
    950: '#000000',
  },
}

SCSS

$custom: #637aba;
$custom-light: #94a0cf;
$custom-dark: #000000;

JSON

{
  "hex": "#637aba",
  "rgb": {
    "r": 99,
    "g": 122,
    "b": 186
  },
  "hsl": {
    "h": 224.138,
    "s": 38.667,
    "l": 55.882
  },
  "oklch": {
    "l": 0.58908,
    "c": 0.10215,
    "h": 268.2
  },
  "luminance": 0.20117
}

Semantic roles & 50–950 ramp

primary

#637ABA

secondary

#CEC5AA

accent

#B059CF

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0D0E14

muted

#7E7E82

Preview Lab

Preview with #637ABA

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

Preview Lab → · Contrast checker → · Palette generator →