#637DEA#637DEA

#637DEA is a light, vivid blue. Relative luminance 0.233; OKLCH L 62.3% C 0.166 H 270.8°. Best body text is #000000 at 5.65:1 contrast (WCAG AA passes).

Color values

HEX	#637DEA
RGB	rgb(99, 125, 234)
HSL	hsl(228, 76%, 65%)
HSV	hsv(228, 58%, 92%)
CMYK	cmyk(57.7%, 46.6%, 0%, 8.2%)
CIE-LAB	lab(55.34, 22.51, -58.13)
CIE-LCH	lch(55.34, 62.34, 291.17°)
OKLab	oklab(62.33% 0.0024 -0.1659)
OKLCH	oklch(62.33% 0.166 270.8)
XYZ	xyz(27.3256, 23.2583, 80.8753)
Luminance	0.2326 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637DEA #EAD063

analogous

#63C1EA #637DEA #8C63EA

triadic

#637DEA #EA637D #7DEA63

tetradic

#637DEA #EA63C1 #EAD063 #63EA8C

square

#637DEA #EA63C1 #EAD063 #63EA8C

split-complementary

#637DEA #EA8C63 #C1EA63

monochromatic

#1938BA #2D50E3 #637DEA #99AAF1 #CFD7F9

Accessibility & contrast

On white

3.72

#637DEA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.65

#637DEA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637DEA

5.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637DEA	#FFFFFF	#000000	##000000
##637DEA	1.00	3.72	5.65	5.65
#FFFFFF	3.72	1.00	21.00	21.00
#000000	5.65	21.00	1.00	1.00
##000000	5.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#498BEE

Deuteranopia (green-blind)

#347FE8

Tritanopia (blue-blind)

#0095A8

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #637dea;
/* rgb */ color: rgb(99, 125, 234);
/* oklch */ color: oklch(62.3% 0.166 270.8);

Tailwind

colors: {
  custom: {
    50: '#9aa2f1',
    500: '#637dea',
    950: '#000000',
  },
}

SCSS

$custom: #637dea;
$custom-light: #9aa2f1;
$custom-dark: #000000;

JSON

{
  "hex": "#637dea",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 234
  },
  "hsl": {
    "h": 228.444,
    "s": 76.271,
    "l": 65.294
  },
  "oklch": {
    "l": 0.62329,
    "c": 0.16594,
    "h": 270.8
  },
  "luminance": 0.2326
}

Semantic roles & 50–950 ramp

primary

#637DEA

secondary

#EBE2BE

accent

#B10DD8

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0F17

muted

#7F7E85

Preview Lab

Preview with #637DEA

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

Preview Lab → · Contrast checker → · Palette generator →