#63B5EB#63B5EB

#63B5EB is a light, moderate cyan. Relative luminance 0.417; OKLCH L 74.3% C 0.112 H 239.5°. Best body text is #000000 at 9.34:1 contrast (WCAG AA passes).

Color values

HEX	#63B5EB
RGB	rgb(99, 181, 235)
HSL	hsl(204, 77%, 65%)
HSV	hsv(204, 58%, 92%)
CMYK	cmyk(57.9%, 23%, 0%, 7.8%)
CIE-LAB	lab(70.66, -9.58, -34.52)
CIE-LCH	lch(70.66, 35.83, 254.49°)
OKLab	oklab(74.27% -0.0569 -0.0967)
OKLCH	oklch(74.27% 0.112 239.5)
XYZ	xyz(36.6593, 41.6952, 84.6972)
Luminance	0.4170 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B5EB #EB9963

analogous

#63EBDD #63B5EB #6371EB

triadic

#63B5EB #EB63B5 #B5EB63

tetradic

#63B5EB #DD63EB #EB9963 #71EB63

square

#63B5EB #DD63EB #EB9963 #71EB63

split-complementary

#63B5EB #EB6371 #EBDD63

monochromatic

#187BBC #2D9BE4 #63B5EB #99CFF2 #CFE8F9

Accessibility & contrast

On white

2.25

#63B5EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.34

#63B5EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B5EB

9.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B5EB	#FFFFFF	#000000	##000000
##63B5EB	1.00	2.25	9.34	9.34
#FFFFFF	2.25	1.00	21.00	21.00
#000000	9.34	21.00	1.00	1.00
##000000	9.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DB5EE

Deuteranopia (green-blind)

#8AA7EA

Tritanopia (blue-blind)

#00C3C7

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #63b5eb;
/* rgb */ color: rgb(99, 181, 235);
/* oklch */ color: oklch(74.3% 0.112 239.5);

Tailwind

colors: {
  custom: {
    50: '#9acbf1',
    500: '#63b5eb',
    950: '#000000',
  },
}

SCSS

$custom: #63b5eb;
$custom-light: #9acbf1;
$custom-dark: #000000;

JSON

{
  "hex": "#63b5eb",
  "rgb": {
    "r": 99,
    "g": 181,
    "b": 235
  },
  "hsl": {
    "h": 203.824,
    "s": 77.273,
    "l": 65.49
  },
  "oklch": {
    "l": 0.74272,
    "c": 0.11216,
    "h": 239.5
  },
  "luminance": 0.41699
}

Semantic roles & 50–950 ramp

primary

#63B5EB

secondary

#ECD0BE

accent

#5E0CDA

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #63B5EB

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

Preview Lab → · Contrast checker → · Palette generator →