#637EF7#637EF7

#637EF7 is a light, vivid blue. Relative luminance 0.243; OKLCH L 63.4% C 0.182 H 270.9°. Best body text is #000000 at 5.86:1 contrast (WCAG AA passes).

Color values

HEX	#637EF7
RGB	rgb(99, 126, 247)
HSL	hsl(229, 90%, 68%)
HSV	hsv(229, 60%, 97%)
CMYK	cmyk(59.9%, 49%, 0%, 3.1%)
CIE-LAB	lab(56.37, 26.15, -63.69)
CIE-LCH	lch(56.37, 68.85, 292.32°)
OKLab	oklab(63.37% 0.0029 -0.1822)
OKLCH	oklch(63.37% 0.182 270.9)
XYZ	xyz(29.3893, 24.2873, 91.1168)
Luminance	0.2429 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637EF7 #F7DC63

analogous

#63C8F7 #637EF7 #9263F7

triadic

#637EF7 #F7637E #7EF763

tetradic

#637EF7 #F763C8 #F7DC63 #63F792

square

#637EF7 #F763C8 #F7DC63 #63F792

split-complementary

#637EF7 #F79263 #C8F763

monochromatic

#0B30D5 #294EF4 #637EF7 #9DAEFA #D7DEFD

Accessibility & contrast

On white

3.58

#637EF7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.86

#637EF7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637EF7

5.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637EF7	#FFFFFF	#000000	##000000
##637EF7	1.00	3.58	5.86	5.86
#FFFFFF	3.58	1.00	21.00	21.00
#000000	5.86	21.00	1.00	1.00
##000000	5.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E8EFB

Deuteranopia (green-blind)

#1F81F4

Tritanopia (blue-blind)

#009AAF

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #637ef7;
/* rgb */ color: rgb(99, 126, 247);
/* oklch */ color: oklch(63.4% 0.182 270.9);

Tailwind

colors: {
  custom: {
    50: '#9ca3fa',
    500: '#637ef7',
    950: '#000000',
  },
}

SCSS

$custom: #637ef7;
$custom-light: #9ca3fa;
$custom-dark: #000000;

JSON

{
  "hex": "#637ef7",
  "rgb": {
    "r": 99,
    "g": 126,
    "b": 247
  },
  "hsl": {
    "h": 229.054,
    "s": 90.244,
    "l": 67.843
  },
  "oklch": {
    "l": 0.63368,
    "c": 0.18226,
    "h": 270.9
  },
  "luminance": 0.2429
}

Semantic roles & 50–950 ramp

primary

#637EF7

secondary

#F2E9C4

accent

#BC00E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0F17

muted

#7F7E85

Preview Lab

Preview with #637EF7

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

Preview Lab → · Contrast checker → · Palette generator →