#63B0E5#63B0E5

#63B0E5 is a light, moderate cyan. Relative luminance 0.394; OKLCH L 72.9% C 0.109 H 240.5°. Best body text is #000000 at 8.87:1 contrast (WCAG AA passes).

Color values

HEX#63B0E5
RGBrgb(99, 176, 229)
HSLhsl(204, 71%, 64%)
HSVhsv(204, 57%, 90%)
CMYKcmyk(56.8%, 23.1%, 0%, 10.2%)
CIE-LABlab(69.01, -8.69, -33.81)
CIE-LCHlch(69.01, 34.91, 255.58°)
OKLaboklab(72.89% -0.0534 -0.0946)
OKLCHoklch(72.89% 0.109 240.5)
XYZxyz(34.8085, 39.3573, 79.8759)
Luminance0.3936 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#63B0E5 #E59863
analogous
#63E5D9 #63B0E5 #636FE5
triadic
#63B0E5 #E563B0 #B0E563
tetradic
#63B0E5 #D963E5 #E59863 #6FE563
square
#63B0E5 #D963E5 #E59863 #6FE563
split-complementary
#63B0E5 #E5636F #E5D963
monochromatic
#1D74B0 #2F95DC #63B0E5 #97CBEE #CCE5F6

Accessibility & contrast

On white

2.37
#63B0E5 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.87
#63B0E5 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B0E5
8.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##63B0E5#FFFFFF#000000##000000
##63B0E51.002.378.878.87
#FFFFFF2.371.0021.0021.00
#0000008.8721.001.001.00
##0000008.8721.001.001.00

Color blindness preview

Protanopia (red-blind)
#98B0E7
Deuteranopia (green-blind)
#87A3E4
Tritanopia (blue-blind)
#00BDC2
Achromatopsia (no color)
#A8A8A8

Design tokens & code

CSS
--color: #63b0e5;
/* rgb */ color: rgb(99, 176, 229);
/* oklch */ color: oklch(72.9% 0.109 240.5);
Tailwind
colors: {
  custom: {
    50: '#99c7ed',
    500: '#63b0e5',
    950: '#000000',
  },
}
SCSS
$custom: #63b0e5;
$custom-light: #99c7ed;
$custom-dark: #000000;
JSON
{
  "hex": "#63b0e5",
  "rgb": {
    "r": 99,
    "g": 176,
    "b": 229
  },
  "hsl": {
    "h": 204.462,
    "s": 71.429,
    "l": 64.314
  },
  "oklch": {
    "l": 0.72886,
    "c": 0.10869,
    "h": 240.5
  },
  "luminance": 0.3936
}

Semantic roles & 50–950 ramp

primary
#63B0E5
secondary
#E8CEBB
accent
#6112D3
background
#F9FCFE
surface
#F2F8FD
border
#CCD1D5
text
#0F1316
muted
#7E8284

Preview Lab

Preview with #63B0E5

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

Preview Lab → · Contrast checker → · Palette generator →

#63B0E5 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva