#637BC2#637BC2

#637BC2 is a mid, moderate blue. Relative luminance 0.207; OKLCH L 59.6% C 0.112 H 268.7°. Best body text is #000000 at 5.14:1 contrast (WCAG AA passes).

Color values

HEX	#637BC2
RGB	rgb(99, 123, 194)
HSL	hsl(225, 44%, 57%)
HSV	hsv(225, 49%, 76%)
CMYK	cmyk(49%, 36.6%, 0%, 23.9%)
CIE-LAB	lab(52.63, 10.99, -39.85)
CIE-LCH	lch(52.63, 41.34, 285.42°)
OKLab	oklab(59.55% -0.0026 -0.1124)
OKLCH	oklch(59.55% 0.112 268.7)
XYZ	xyz(21.9630, 20.7122, 53.8690)
Luminance	0.2071 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637BC2 #C2AA63

analogous

#63ABC2 #637BC2 #7A63C2

triadic

#637BC2 #C2637B #7BC263

tetradic

#637BC2 #C263AB #C2AA63 #63C27A

square

#637BC2 #C263AB #C2AA63 #63C27A

split-complementary

#637BC2 #C27A63 #ABC263

monochromatic

#30437B #415BA7 #637BC2 #8FA0D3 #BBC5E4

Accessibility & contrast

On white

4.08

#637BC2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.14

#637BC2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637BC2

5.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637BC2	#FFFFFF	#000000	##000000
##637BC2	1.00	4.08	5.14	5.14
#FFFFFF	4.08	1.00	21.00	21.00
#000000	5.14	21.00	1.00	1.00
##000000	5.14	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6082C5

Deuteranopia (green-blind)

#567AC0

Tritanopia (blue-blind)

#3C8A95

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #637bc2;
/* rgb */ color: rgb(99, 123, 194);
/* oklch */ color: oklch(59.6% 0.112 268.7);

Tailwind

colors: {
  custom: {
    50: '#95a0d5',
    500: '#637bc2',
    950: '#000000',
  },
}

SCSS

$custom: #637bc2;
$custom-light: #95a0d5;
$custom-dark: #000000;

JSON

{
  "hex": "#637bc2",
  "rgb": {
    "r": 99,
    "g": 123,
    "b": 194
  },
  "hsl": {
    "h": 224.842,
    "s": 43.779,
    "l": 57.451
  },
  "oklch": {
    "l": 0.5955,
    "c": 0.11242,
    "h": 268.7
  },
  "luminance": 0.20714
}

Semantic roles & 50–950 ramp

primary

#637BC2

secondary

#D4CAAD

accent

#B354D4

background

#F9F9FD

surface

#F2F2FA

border

#CCCCD3

text

#0E0E14

muted

#7E7E83

Preview Lab

Preview with #637BC2

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

Preview Lab → · Contrast checker → · Palette generator →