#636BFF#636BFF

#636BFF is a mid, highly saturated blue. Relative luminance 0.204; OKLCH L 60.5% C 0.216 H 275.5°. Best body text is #000000 at 5.08:1 contrast (WCAG AA passes).

Color values

HEX#636BFF
RGBrgb(99, 107, 255)
HSLhsl(237, 100%, 69%)
HSVhsv(237, 61%, 100%)
CMYKcmyk(61.2%, 58%, 0%, 0%)
CIE-LABlab(52.27, 40.19, -74.75)
CIE-LCHlch(52.27, 84.87, 298.26°)
OKLaboklab(60.46% 0.0207 -0.215)
OKLCHoklch(60.46% 0.216 275.5)
XYZxyz(28.4474, 20.3857, 97.0241)
Luminance0.2039 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#636BFF #FFF763
analogous
#63B9FF #636BFF #A963FF
triadic
#636BFF #FF636B #6BFF63
tetradic
#636BFF #FF63B9 #FFF763 #63FFA9
square
#636BFF #FF63B9 #FFF763 #63FFA9
split-complementary
#636BFF #FFA963 #B9FF63
monochromatic
#000CE8 #2631FF #636BFF #A0A5FF #DDDFFF

Accessibility & contrast

On white

4.14
#636BFF on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.08
#636BFF on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636BFF
5.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##636BFF#FFFFFF#000000##000000
##636BFF1.004.145.085.08
#FFFFFF4.141.0021.0021.00
#0000005.0821.001.001.00
##0000005.0821.001.001.00

Color blindness preview

Protanopia (red-blind)
#0084FF
Deuteranopia (green-blind)
#0076FC
Tritanopia (blue-blind)
#008FAB
Achromatopsia (no color)
#7D7D7D

Design tokens & code

CSS
--color: #636bff;
/* rgb */ color: rgb(99, 107, 255);
/* oklch */ color: oklch(60.5% 0.216 275.5);
Tailwind
colors: {
  custom: {
    50: '#9e95ff',
    500: '#636bff',
    950: '#000000',
  },
}
SCSS
$custom: #636bff;
$custom-light: #9e95ff;
$custom-dark: #000000;
JSON
{
  "hex": "#636bff",
  "rgb": {
    "r": 99,
    "g": 107,
    "b": 255
  },
  "hsl": {
    "h": 236.923,
    "s": 100,
    "l": 69.412
  },
  "oklch": {
    "l": 0.60461,
    "c": 0.21598,
    "h": 275.5
  },
  "luminance": 0.20388
}

Semantic roles & 50–950 ramp

primary
#636BFF
secondary
#F5F3C8
accent
#DA00E6
background
#FAF9FF
surface
#F4F1FF
border
#CECBD7
text
#100D18
muted
#7F7E86

Preview Lab

Preview with #636BFF

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

Preview Lab → · Contrast checker → · Palette generator →

#636BFF Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva