#63B5EE#63B5EE

#63B5EE is a light, moderate cyan. Relative luminance 0.419; OKLCH L 74.4% C 0.115 H 241.0°. Best body text is #000000 at 9.37:1 contrast (WCAG AA passes).

Color values

HEX	#63B5EE
RGB	rgb(99, 181, 238)
HSL	hsl(205, 80%, 66%)
HSV	hsv(205, 58%, 93%)
CMYK	cmyk(58.4%, 23.9%, 0%, 6.7%)
CIE-LAB	lab(70.78, -8.66, -35.96)
CIE-LCH	lch(70.78, 36.99, 256.46°)
OKLab	oklab(74.41% -0.0559 -0.1008)
OKLCH	oklch(74.41% 0.115 241)
XYZ	xyz(37.0963, 41.8700, 86.9991)
Luminance	0.4187 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B5EE #EE9C63

analogous

#63EEE1 #63B5EE #636FEE

triadic

#63B5EE #EE63B5 #B5EE63

tetradic

#63B5EE #E163EE #EE9C63 #6FEE63

square

#63B5EE #E163EE #EE9C63 #6FEE63

split-complementary

#63B5EE #EE636F #EEE163

monochromatic

#157BC2 #2C9BE8 #63B5EE #9ACFF4 #D1E9FA

Accessibility & contrast

On white

2.24

#63B5EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.37

#63B5EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B5EE

9.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B5EE	#FFFFFF	#000000	##000000
##63B5EE	1.00	2.24	9.37	9.37
#FFFFFF	2.24	1.00	21.00	21.00
#000000	9.37	21.00	1.00	1.00
##000000	9.37	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9CB5F1

Deuteranopia (green-blind)

#89A7ED

Tritanopia (blue-blind)

#00C3C8

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #63b5ee;
/* rgb */ color: rgb(99, 181, 238);
/* oklch */ color: oklch(74.4% 0.115 241.0);

Tailwind

colors: {
  custom: {
    50: '#9acbf3',
    500: '#63b5ee',
    950: '#000000',
  },
}

SCSS

$custom: #63b5ee;
$custom-light: #9acbf3;
$custom-dark: #000000;

JSON

{
  "hex": "#63b5ee",
  "rgb": {
    "r": 99,
    "g": 181,
    "b": 238
  },
  "hsl": {
    "h": 204.604,
    "s": 80.347,
    "l": 66.078
  },
  "oklch": {
    "l": 0.74408,
    "c": 0.11528,
    "h": 241
  },
  "luminance": 0.41873
}

Semantic roles & 50–950 ramp

primary

#63B5EE

secondary

#EDD2C0

accent

#6009DD

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #63B5EE

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

Preview Lab → · Contrast checker → · Palette generator →