#637DF7#637DF7

#637DF7 is a light, vivid blue. Relative luminance 0.240; OKLCH L 63.2% C 0.183 H 271.2°. Best body text is #000000 at 5.81:1 contrast (WCAG AA passes).

Color values

HEX#637DF7
RGBrgb(99, 125, 247)
HSLhsl(229, 90%, 68%)
HSVhsv(229, 60%, 97%)
CMYKcmyk(59.9%, 49.4%, 0%, 3.1%)
CIE-LABlab(56.12, 26.75, -64.09)
CIE-LCHlch(56.12, 69.45, 292.66°)
OKLaboklab(63.18% 0.0039 -0.1834)
OKLCHoklch(63.18% 0.183 271.2)
XYZxyz(29.2621, 24.0329, 91.0744)
Luminance0.2404 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#637DF7 #F7DD63
analogous
#63C7F7 #637DF7 #9363F7
triadic
#637DF7 #F7637D #7DF763
tetradic
#637DF7 #F763C7 #F7DD63 #63F793
square
#637DF7 #F763C7 #F7DD63 #63F793
split-complementary
#637DF7 #F79363 #C7F763
monochromatic
#0B2ED5 #294CF4 #637DF7 #9DAEFA #D7DEFD

Accessibility & contrast

On white

3.62
#637DF7 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.81
#637DF7 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637DF7
5.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##637DF7#FFFFFF#000000##000000
##637DF71.003.625.815.81
#FFFFFF3.621.0021.0021.00
#0000005.8121.001.001.00
##0000005.8121.001.001.00

Color blindness preview

Protanopia (red-blind)
#3B8DFB
Deuteranopia (green-blind)
#1A80F4
Tritanopia (blue-blind)
#0099AE
Achromatopsia (no color)
#878787

Design tokens & code

CSS
--color: #637df7;
/* rgb */ color: rgb(99, 125, 247);
/* oklch */ color: oklch(63.2% 0.183 271.2);
Tailwind
colors: {
  custom: {
    50: '#9ca2fa',
    500: '#637df7',
    950: '#000000',
  },
}
SCSS
$custom: #637df7;
$custom-light: #9ca2fa;
$custom-dark: #000000;
JSON
{
  "hex": "#637df7",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 247
  },
  "hsl": {
    "h": 229.459,
    "s": 90.244,
    "l": 67.843
  },
  "oklch": {
    "l": 0.63176,
    "c": 0.18349,
    "h": 271.2
  },
  "luminance": 0.24035
}

Semantic roles & 50–950 ramp

primary
#637DF7
secondary
#F2EAC4
accent
#BD00E6
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#0F0F17
muted
#7F7E85

Preview Lab

Preview with #637DF7

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

Preview Lab → · Contrast checker → · Palette generator →

#637DF7 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva