#637BEE#637BEE

#637BEE is a light, vivid blue. Relative luminance 0.230; OKLCH L 62.2% C 0.174 H 271.6°. Best body text is #000000 at 5.60:1 contrast (WCAG AA passes).

Color values

HEX	#637BEE
RGB	rgb(99, 123, 238)
HSL	hsl(230, 80%, 66%)
HSV	hsv(230, 58%, 93%)
CMYK	cmyk(58.4%, 48.3%, 0%, 6.7%)
CIE-LAB	lab(55.06, 25.03, -60.80)
CIE-LCH	lch(55.06, 65.75, 292.37°)
OKLab	oklab(62.2% 0.0049 -0.1738)
OKLCH	oklch(62.2% 0.174 271.6)
XYZ	xyz(27.6561, 22.9894, 83.8524)
Luminance	0.2299 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637BEE #EED663

analogous

#63C0EE #637BEE #9063EE

triadic

#637BEE #EE637B #7BEE63

tetradic

#637BEE #EE63C0 #EED663 #63EE90

square

#637BEE #EE63C0 #EED663 #63EE90

split-complementary

#637BEE #EE9063 #C0EE63

monochromatic

#1533C2 #2C4CE8 #637BEE #9AAAF4 #D1D8FA

Accessibility & contrast

On white

3.75

#637BEE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.60

#637BEE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637BEE

5.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637BEE	#FFFFFF	#000000	##000000
##637BEE	1.00	3.75	5.60	5.60
#FFFFFF	3.75	1.00	21.00	21.00
#000000	5.60	21.00	1.00	1.00
##000000	5.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#418AF2

Deuteranopia (green-blind)

#287EEC

Tritanopia (blue-blind)

#0095A9

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #637bee;
/* rgb */ color: rgb(99, 123, 238);
/* oklch */ color: oklch(62.2% 0.174 271.6);

Tailwind

colors: {
  custom: {
    50: '#9aa0f4',
    500: '#637bee',
    950: '#000000',
  },
}

SCSS

$custom: #637bee;
$custom-light: #9aa0f4;
$custom-dark: #000000;

JSON

{
  "hex": "#637bee",
  "rgb": {
    "r": 99,
    "g": 123,
    "b": 238
  },
  "hsl": {
    "h": 229.64,
    "s": 80.347,
    "l": 66.078
  },
  "oklch": {
    "l": 0.62197,
    "c": 0.17386,
    "h": 271.6
  },
  "luminance": 0.22992
}

Semantic roles & 50–950 ramp

primary

#637BEE

secondary

#EDE5C0

accent

#B809DD

background

#FAF9FF

surface

#F3F2FE

border

#CDCCD6

text

#0F0E17

muted

#7F7E85

Preview Lab

Preview with #637BEE

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

Preview Lab → · Contrast checker → · Palette generator →