#637DF9#637DF9

#637DF9 is a light, vivid blue. Relative luminance 0.242; OKLCH L 63.3% C 0.186 H 271.3°. Best body text is #000000 at 5.83:1 contrast (WCAG AA passes).

Color values

HEX	#637DF9
RGB	rgb(99, 125, 249)
HSL	hsl(230, 93%, 68%)
HSV	hsv(230, 60%, 98%)
CMYK	cmyk(60.2%, 49.8%, 0%, 2.4%)
CIE-LAB	lab(56.24, 27.41, -65.00)
CIE-LCH	lch(56.24, 70.54, 292.86°)
OKLab	oklab(63.31% 0.0041 -0.1861)
OKLCH	oklch(63.31% 0.186 271.3)
XYZ	xyz(29.5724, 24.1570, 92.7085)
Luminance	0.2416 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637DF9 #F9DF63

analogous

#63C8F9 #637DF9 #9463F9

triadic

#637DF9 #F9637D #7DF963

tetradic

#637DF9 #F963C8 #F9DF63 #63F994

square

#637DF9 #F963C8 #F9DF63 #63F994

split-complementary

#637DF9 #F99463 #C8F963

monochromatic

#082DD9 #284CF7 #637DF9 #9EAEFB #D9DFFE

Accessibility & contrast

On white

3.60

#637DF9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.83

#637DF9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637DF9

5.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637DF9	#FFFFFF	#000000	##000000
##637DF9	1.00	3.60	5.83	5.83
#FFFFFF	3.60	1.00	21.00	21.00
#000000	5.83	21.00	1.00	1.00
##000000	5.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#398EFD

Deuteranopia (green-blind)

#1381F6

Tritanopia (blue-blind)

#009AAF

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #637df9;
/* rgb */ color: rgb(99, 125, 249);
/* oklch */ color: oklch(63.3% 0.186 271.3);

Tailwind

colors: {
  custom: {
    50: '#9ca2fc',
    500: '#637df9',
    950: '#000000',
  },
}

SCSS

$custom: #637df9;
$custom-light: #9ca2fc;
$custom-dark: #000000;

JSON

{
  "hex": "#637df9",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 249
  },
  "hsl": {
    "h": 229.6,
    "s": 92.593,
    "l": 68.235
  },
  "oklch": {
    "l": 0.63309,
    "c": 0.18616,
    "h": 271.3
  },
  "luminance": 0.24159
}

Semantic roles & 50–950 ramp

primary

#637DF9

secondary

#F3EBC5

accent

#BE00E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0F18

muted

#7F7E86

Preview Lab

Preview with #637DF9

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

Preview Lab → · Contrast checker → · Palette generator →