#63B1EE#63B1EE

#63B1EE is a light, moderate cyan. Relative luminance 0.403; OKLCH L 73.5% C 0.118 H 244.0°. Best body text is #000000 at 9.05:1 contrast (WCAG AA passes).

Color values

HEX#63B1EE
RGBrgb(99, 177, 238)
HSLhsl(206, 80%, 66%)
HSVhsv(206, 58%, 93%)
CMYKcmyk(58.4%, 25.6%, 0%, 6.7%)
CIE-LABlab(69.66, -6.47, -37.71)
CIE-LCHlch(69.66, 38.26, 260.26°)
OKLaboklab(73.52% -0.0516 -0.1059)
OKLCHoklch(73.52% 0.118 244)
XYZxyz(36.2947, 40.2666, 86.7319)
Luminance0.4027 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#63B1EE #EEA063
analogous
#63EEE5 #63B1EE #636BEE
triadic
#63B1EE #EE63B1 #B1EE63
tetradic
#63B1EE #E563EE #EEA063 #6BEE63
square
#63B1EE #E563EE #EEA063 #6BEE63
split-complementary
#63B1EE #EE636B #EEE563
monochromatic
#1576C2 #2C95E8 #63B1EE #9ACDF4 #D1E8FA

Accessibility & contrast

On white

2.32
#63B1EE on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.05
#63B1EE on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B1EE
9.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##63B1EE#FFFFFF#000000##000000
##63B1EE1.002.329.059.05
#FFFFFF2.321.0021.0021.00
#0000009.0521.001.001.00
##0000009.0521.001.001.00

Color blindness preview

Protanopia (red-blind)
#96B2F1
Deuteranopia (green-blind)
#84A4ED
Tritanopia (blue-blind)
#00C0C6
Achromatopsia (no color)
#AAAAAA

Design tokens & code

CSS
--color: #63b1ee;
/* rgb */ color: rgb(99, 177, 238);
/* oklch */ color: oklch(73.5% 0.118 244.0);
Tailwind
colors: {
  custom: {
    50: '#9ac8f3',
    500: '#63b1ee',
    950: '#000000',
  },
}
SCSS
$custom: #63b1ee;
$custom-light: #9ac8f3;
$custom-dark: #000000;
JSON
{
  "hex": "#63b1ee",
  "rgb": {
    "r": 99,
    "g": 177,
    "b": 238
  },
  "hsl": {
    "h": 206.331,
    "s": 80.347,
    "l": 66.078
  },
  "oklch": {
    "l": 0.73521,
    "c": 0.11779,
    "h": 244
  },
  "luminance": 0.4027
}

Semantic roles & 50–950 ramp

primary
#63B1EE
secondary
#EDD4C0
accent
#6609DD
background
#FAFCFE
surface
#F3F8FD
border
#CDD1D5
text
#0F1317
muted
#7F8285

Preview Lab

Preview with #63B1EE

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

Preview Lab → · Contrast checker → · Palette generator →

#63B1EE Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva