#637DF8#637DF8

#637DF8 is a light, vivid blue. Relative luminance 0.241; OKLCH L 63.2% C 0.185 H 271.2°. Best body text is #000000 at 5.82:1 contrast (WCAG AA passes).

Color values

HEX	#637DF8
RGB	rgb(99, 125, 248)
HSL	hsl(230, 91%, 68%)
HSV	hsv(230, 60%, 97%)
CMYK	cmyk(60.1%, 49.6%, 0%, 2.7%)
CIE-LAB	lab(56.18, 27.08, -64.55)
CIE-LCH	lch(56.18, 70.00, 292.76°)
OKLab	oklab(63.24% 0.004 -0.1848)
OKLCH	oklch(63.24% 0.185 271.2)
XYZ	xyz(29.4168, 24.0948, 91.8893)
Luminance	0.2410 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637DF8 #F8DE63

analogous

#63C8F8 #637DF8 #9363F8

triadic

#637DF8 #F8637D #7DF863

tetradic

#637DF8 #F863C8 #F8DE63 #63F893

square

#637DF8 #F863C8 #F8DE63 #63F893

split-complementary

#637DF8 #F89363 #C8F863

monochromatic

#0A2DD7 #284CF5 #637DF8 #9EAEFB #D8DFFD

Accessibility & contrast

On white

3.61

#637DF8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.82

#637DF8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637DF8

5.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637DF8	#FFFFFF	#000000	##000000
##637DF8	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)

#3A8EFC

Deuteranopia (green-blind)

#1780F5

Tritanopia (blue-blind)

#0099AF

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #637df8;
/* rgb */ color: rgb(99, 125, 248);
/* oklch */ color: oklch(63.2% 0.185 271.2);

Tailwind

colors: {
  custom: {
    50: '#9ca2fb',
    500: '#637df8',
    950: '#000000',
  },
}

SCSS

$custom: #637df8;
$custom-light: #9ca2fb;
$custom-dark: #000000;

JSON

{
  "hex": "#637df8",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 248
  },
  "hsl": {
    "h": 229.53,
    "s": 91.411,
    "l": 68.039
  },
  "oklch": {
    "l": 0.63243,
    "c": 0.18483,
    "h": 271.2
  },
  "luminance": 0.24097
}

Semantic roles & 50–950 ramp

primary

#637DF8

secondary

#F2EAC5

accent

#BD00E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0F17

muted

#7F7E85

Preview Lab

Preview with #637DF8

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

Preview Lab → · Contrast checker → · Palette generator →