#637DF4#637DF4

#637DF4 is a light, vivid blue. Relative luminance 0.239; OKLCH L 63.0% C 0.179 H 271.1°. Best body text is #000000 at 5.77:1 contrast (WCAG AA passes).

Color values

HEX	#637DF4
RGB	rgb(99, 125, 244)
HSL	hsl(229, 87%, 67%)
HSV	hsv(229, 59%, 96%)
CMYK	cmyk(59.4%, 48.8%, 0%, 4.3%)
CIE-LAB	lab(55.94, 25.77, -62.73)
CIE-LCH	lch(55.94, 67.82, 292.33°)
OKLab	oklab(62.98% 0.0036 -0.1794)
OKLCH	oklch(62.98% 0.179 271.1)
XYZ	xyz(28.8029, 23.8492, 88.6559)
Luminance	0.2385 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637DF4 #F4DA63

analogous

#63C6F4 #637DF4 #9163F4

triadic

#637DF4 #F4637D #7DF463

tetradic

#637DF4 #F463C6 #F4DA63 #63F491

square

#637DF4 #F463C6 #F4DA63 #63F491

split-complementary

#637DF4 #F49163 #C6F463

monochromatic

#0F31CE #2A4DF0 #637DF4 #9CADF8 #D5DCFC

Accessibility & contrast

On white

3.64

#637DF4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.77

#637DF4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637DF4

5.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637DF4	#FFFFFF	#000000	##000000
##637DF4	1.00	3.64	5.77	5.77
#FFFFFF	3.64	1.00	21.00	21.00
#000000	5.77	21.00	1.00	1.00
##000000	5.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F8DF8

Deuteranopia (green-blind)

#2280F2

Tritanopia (blue-blind)

#0098AD

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #637df4;
/* rgb */ color: rgb(99, 125, 244);
/* oklch */ color: oklch(63.0% 0.179 271.1);

Tailwind

colors: {
  custom: {
    50: '#9ba2f8',
    500: '#637df4',
    950: '#000000',
  },
}

SCSS

$custom: #637df4;
$custom-light: #9ba2f8;
$custom-dark: #000000;

JSON

{
  "hex": "#637df4",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 244
  },
  "hsl": {
    "h": 229.241,
    "s": 86.826,
    "l": 67.255
  },
  "oklch": {
    "l": 0.62977,
    "c": 0.17948,
    "h": 271.1
  },
  "luminance": 0.23852
}

Semantic roles & 50–950 ramp

primary

#637DF4

secondary

#F0E8C3

accent

#BB02E3

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0F17

muted

#7F7E85

Preview Lab

Preview with #637DF4

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

Preview Lab → · Contrast checker → · Palette generator →