#637FF7#637FF7

#637FF7 is a light, vivid blue. Relative luminance 0.245; OKLCH L 63.6% C 0.181 H 270.6°. Best body text is #000000 at 5.91:1 contrast (WCAG AA passes).

Color values

HEX#637FF7
RGBrgb(99, 127, 247)
HSLhsl(229, 90%, 68%)
HSVhsv(229, 60%, 97%)
CMYKcmyk(59.9%, 48.6%, 0%, 3.1%)
CIE-LABlab(56.63, 25.54, -63.28)
CIE-LCHlch(56.63, 68.24, 291.98°)
OKLaboklab(63.56% 0.0019 -0.181)
OKLCHoklch(63.56% 0.181 270.6)
XYZxyz(29.5178, 24.5444, 91.1597)
Luminance0.2455 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#637FF7 #F7DB63
analogous
#63C9F7 #637FF7 #9163F7
triadic
#637FF7 #F7637F #7FF763
tetradic
#637FF7 #F763C9 #F7DB63 #63F791
square
#637FF7 #F763C9 #F7DB63 #63F791
split-complementary
#637FF7 #F79163 #C9F763
monochromatic
#0B31D5 #294FF4 #637FF7 #9DAFFA #D7DFFD

Accessibility & contrast

On white

3.55
#637FF7 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.91
#637FF7 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637FF7
5.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##637FF7#FFFFFF#000000##000000
##637FF71.003.555.915.91
#FFFFFF3.551.0021.0021.00
#0000005.9121.001.001.00
##0000005.9121.001.001.00

Color blindness preview

Protanopia (red-blind)
#408FFB
Deuteranopia (green-blind)
#2382F4
Tritanopia (blue-blind)
#009AAF
Achromatopsia (no color)
#888888

Design tokens & code

CSS
--color: #637ff7;
/* rgb */ color: rgb(99, 127, 247);
/* oklch */ color: oklch(63.6% 0.181 270.6);
Tailwind
colors: {
  custom: {
    50: '#9ba3fa',
    500: '#637ff7',
    950: '#000000',
  },
}
SCSS
$custom: #637ff7;
$custom-light: #9ba3fa;
$custom-dark: #000000;
JSON
{
  "hex": "#637ff7",
  "rgb": {
    "r": 99,
    "g": 127,
    "b": 247
  },
  "hsl": {
    "h": 228.649,
    "s": 90.244,
    "l": 67.843
  },
  "oklch": {
    "l": 0.63561,
    "c": 0.18104,
    "h": 270.6
  },
  "luminance": 0.24547
}

Semantic roles & 50–950 ramp

primary
#637FF7
secondary
#F2E9C4
accent
#BA00E6
background
#FAFAFF
surface
#F4F3FF
border
#CECDD7
text
#0F0F17
muted
#7F7F85

Preview Lab

Preview with #637FF7

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

Preview Lab → · Contrast checker → · Palette generator →

#637FF7 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva