#63B7E9#63B7E9

#63B7E9 is a light, moderate cyan. Relative luminance 0.424; OKLCH L 74.6% C 0.109 H 236.9°. Best body text is #000000 at 9.48:1 contrast (WCAG AA passes).

Color values

HEX#63B7E9
RGBrgb(99, 183, 233)
HSLhsl(202, 75%, 65%)
HSVhsv(202, 58%, 91%)
CMYKcmyk(57.5%, 21.5%, 0%, 8.6%)
CIE-LABlab(71.15, -11.26, -32.68)
CIE-LCHlch(71.15, 34.57, 250.98°)
OKLaboklab(74.63% -0.0597 -0.0914)
OKLCHoklch(74.63% 0.109 236.9)
XYZxyz(36.7815, 42.3994, 83.3206)
Luminance0.4240 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#63B7E9 #E99563
analogous
#63E9D8 #63B7E9 #6374E9
triadic
#63B7E9 #E963B7 #B7E963
tetradic
#63B7E9 #D863E9 #E99563 #74E963
square
#63B7E9 #D863E9 #E99563 #74E963
split-complementary
#63B7E9 #E96374 #E9D863
monochromatic
#1A7DB8 #2D9EE1 #63B7E9 #99D0F1 #CEE9F8

Accessibility & contrast

On white

2.22
#63B7E9 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.48
#63B7E9 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B7E9
9.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##63B7E9#FFFFFF#000000##000000
##63B7E91.002.229.489.48
#FFFFFF2.221.0021.0021.00
#0000009.4821.001.001.00
##0000009.4821.001.001.00

Color blindness preview

Protanopia (red-blind)
#A0B6EB
Deuteranopia (green-blind)
#8DA8E8
Tritanopia (blue-blind)
#00C4C8
Achromatopsia (no color)
#AEAEAE

Design tokens & code

CSS
--color: #63b7e9;
/* rgb */ color: rgb(99, 183, 233);
/* oklch */ color: oklch(74.6% 0.109 236.9);
Tailwind
colors: {
  custom: {
    50: '#99ccf0',
    500: '#63b7e9',
    950: '#000000',
  },
}
SCSS
$custom: #63b7e9;
$custom-light: #99ccf0;
$custom-dark: #000000;
JSON
{
  "hex": "#63b7e9",
  "rgb": {
    "r": 99,
    "g": 183,
    "b": 233
  },
  "hsl": {
    "h": 202.388,
    "s": 75.281,
    "l": 65.098
  },
  "oklch": {
    "l": 0.74631,
    "c": 0.10916,
    "h": 236.9
  },
  "luminance": 0.42403
}

Semantic roles & 50–950 ramp

primary
#63B7E9
secondary
#EBCEBD
accent
#590ED7
background
#FAFCFE
surface
#F3F8FD
border
#CDD1D5
text
#0F1316
muted
#7F8284

Preview Lab

Preview with #63B7E9

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

Preview Lab → · Contrast checker → · Palette generator →

#63B7E9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva