#637FF5#637FF5

#637FF5 is a light, vivid blue. Relative luminance 0.244; OKLCH L 63.4% C 0.178 H 270.6°. Best body text is #000000 at 5.88:1 contrast (WCAG AA passes).

Color values

HEX#637FF5
RGBrgb(99, 127, 245)
HSLhsl(228, 88%, 67%)
HSVhsv(228, 60%, 96%)
CMYKcmyk(59.6%, 48.2%, 0%, 3.9%)
CIE-LABlab(56.51, 24.89, -62.37)
CIE-LCHlch(56.51, 67.15, 291.76°)
OKLaboklab(63.43% 0.0017 -0.1783)
OKLCHoklch(63.43% 0.178 270.6)
XYZxyz(29.2109, 24.4216, 89.5430)
Luminance0.2442 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#637FF5 #F5D963
analogous
#63C8F5 #637FF5 #9063F5
triadic
#637FF5 #F5637F #7FF563
tetradic
#637FF5 #F563C8 #F5D963 #63F590
square
#637FF5 #F563C8 #F5D963 #63F590
split-complementary
#637FF5 #F59063 #C8F563
monochromatic
#0D33D0 #2950F1 #637FF5 #9DAEF9 #D6DDFC

Accessibility & contrast

On white

3.57
#637FF5 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.88
#637FF5 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637FF5
5.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##637FF5#FFFFFF#000000##000000
##637FF51.003.575.885.88
#FFFFFF3.571.0021.0021.00
#0000005.8821.001.001.00
##0000005.8821.001.001.00

Color blindness preview

Protanopia (red-blind)
#438EF9
Deuteranopia (green-blind)
#2781F3
Tritanopia (blue-blind)
#009AAE
Achromatopsia (no color)
#888888

Design tokens & code

CSS
--color: #637ff5;
/* rgb */ color: rgb(99, 127, 245);
/* oklch */ color: oklch(63.4% 0.178 270.6);
Tailwind
colors: {
  custom: {
    50: '#9ba3f9',
    500: '#637ff5',
    950: '#000000',
  },
}
SCSS
$custom: #637ff5;
$custom-light: #9ba3f9;
$custom-dark: #000000;
JSON
{
  "hex": "#637ff5",
  "rgb": {
    "r": 99,
    "g": 127,
    "b": 245
  },
  "hsl": {
    "h": 228.493,
    "s": 87.952,
    "l": 67.451
  },
  "oklch": {
    "l": 0.6343,
    "c": 0.17836,
    "h": 270.6
  },
  "luminance": 0.24424
}

Semantic roles & 50–950 ramp

primary
#637FF5
secondary
#F1E8C3
accent
#B901E5
background
#FAFAFF
surface
#F4F3FF
border
#CECDD7
text
#0F0F17
muted
#7F7F85

Preview Lab

Preview with #637FF5

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

Preview Lab → · Contrast checker → · Palette generator →

#637FF5 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva