#637EF4#637EF4

#637EF4 is a light, vivid blue. Relative luminance 0.241; OKLCH L 63.2% C 0.178 H 270.8°. Best body text is #000000 at 5.82:1 contrast (WCAG AA passes).

Color values

HEX	#637EF4
RGB	rgb(99, 126, 244)
HSL	hsl(229, 87%, 67%)
HSV	hsv(229, 59%, 96%)
CMYK	cmyk(59.4%, 48.4%, 0%, 4.3%)
CIE-LAB	lab(56.19, 25.17, -62.32)
CIE-LCH	lch(56.19, 67.21, 291.99°)
OKLab	oklab(63.17% 0.0026 -0.1782)
OKLCH	oklch(63.17% 0.178 270.8)
XYZ	xyz(28.9301, 24.1037, 88.6983)
Luminance	0.2411 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637EF4 #F4D963

analogous

#63C6F4 #637EF4 #9163F4

triadic

#637EF4 #F4637E #7EF463

tetradic

#637EF4 #F463C6 #F4D963 #63F491

square

#637EF4 #F463C6 #F4D963 #63F491

split-complementary

#637EF4 #F49163 #C6F463

monochromatic

#0F32CE #2A4FF0 #637EF4 #9CADF8 #D5DDFC

Accessibility & contrast

On white

3.61

#637EF4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.82

#637EF4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637EF4

5.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637EF4	#FFFFFF	#000000	##000000
##637EF4	1.00	3.61	5.82	5.82
#FFFFFF	3.61	1.00	21.00	21.00
#000000	5.82	21.00	1.00	1.00
##000000	5.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#418DF8

Deuteranopia (green-blind)

#2681F2

Tritanopia (blue-blind)

#0099AD

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #637ef4;
/* rgb */ color: rgb(99, 126, 244);
/* oklch */ color: oklch(63.2% 0.178 270.8);

Tailwind

colors: {
  custom: {
    50: '#9ba3f8',
    500: '#637ef4',
    950: '#000000',
  },
}

SCSS

$custom: #637ef4;
$custom-light: #9ba3f8;
$custom-dark: #000000;

JSON

{
  "hex": "#637ef4",
  "rgb": {
    "r": 99,
    "g": 126,
    "b": 244
  },
  "hsl": {
    "h": 228.828,
    "s": 86.826,
    "l": 67.255
  },
  "oklch": {
    "l": 0.63171,
    "c": 0.17824,
    "h": 270.8
  },
  "luminance": 0.24106
}

Semantic roles & 50–950 ramp

primary

#637EF4

secondary

#F0E8C3

accent

#B902E3

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0F17

muted

#7F7E85

Preview Lab

Preview with #637EF4

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

Preview Lab → · Contrast checker → · Palette generator →