#637EFE#637EFE

#637EFE is a light, vivid blue. Relative luminance 0.247; OKLCH L 63.8% C 0.192 H 271.1°. Best body text is #000000 at 5.95:1 contrast (WCAG AA passes).

Color values

HEX	#637EFE
RGB	rgb(99, 126, 254)
HSL	hsl(230, 99%, 69%)
HSV	hsv(230, 61%, 100%)
CMYK	cmyk(61%, 50.4%, 0%, 0.4%)
CIE-LAB	lab(56.81, 28.44, -66.85)
CIE-LCH	lch(56.81, 72.65, 293.05°)
OKLab	oklab(63.84% 0.0036 -0.1915)
OKLCH	oklch(63.84% 0.192 271.1)
XYZ	xyz(30.4898, 24.7275, 96.9129)
Luminance	0.2473 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637EFE #FEE363

analogous

#63CCFE #637EFE #9663FE

triadic

#637EFE #FE637E #7EFE63

tetradic

#637EFE #FE63CC #FEE363 #63FE96

square

#637EFE #FE63CC #FEE363 #63FE96

split-complementary

#637EFE #FE9663 #CCFE63

monochromatic

#0129E5 #264CFE #637EFE #A0B0FE #DDE3FF

Accessibility & contrast

On white

3.53

#637EFE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.95

#637EFE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637EFE

5.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637EFE	#FFFFFF	#000000	##000000
##637EFE	1.00	3.53	5.95	5.95
#FFFFFF	3.53	1.00	21.00	21.00
#000000	5.95	21.00	1.00	1.00
##000000	5.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#358FFF

Deuteranopia (green-blind)

#0082FB

Tritanopia (blue-blind)

#009CB2

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #637efe;
/* rgb */ color: rgb(99, 126, 254);
/* oklch */ color: oklch(63.8% 0.192 271.1);

Tailwind

colors: {
  custom: {
    50: '#9da3ff',
    500: '#637efe',
    950: '#000000',
  },
}

SCSS

$custom: #637efe;
$custom-light: #9da3ff;
$custom-dark: #000000;

JSON

{
  "hex": "#637efe",
  "rgb": {
    "r": 99,
    "g": 126,
    "b": 254
  },
  "hsl": {
    "h": 229.548,
    "s": 98.726,
    "l": 69.216
  },
  "oklch": {
    "l": 0.63836,
    "c": 0.19158,
    "h": 271.1
  },
  "luminance": 0.2473
}

Semantic roles & 50–950 ramp

primary

#637EFE

secondary

#F5EDC8

accent

#BE00E6

background

#FAFAFF

surface

#F4F3FF

border

#CECDD7

text

#0F0F18

muted

#7F7F86

Preview Lab

Preview with #637EFE

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

Preview Lab → · Contrast checker → · Palette generator →