#63B5F0#63B5F0

#63B5F0 is a light, moderate cyan. Relative luminance 0.420; OKLCH L 74.5% C 0.117 H 241.9°. Best body text is #000000 at 9.40:1 contrast (WCAG AA passes).

Color values

HEX	#63B5F0
RGB	rgb(99, 181, 240)
HSL	hsl(205, 82%, 66%)
HSV	hsv(205, 59%, 94%)
CMYK	cmyk(58.8%, 24.6%, 0%, 5.9%)
CIE-LAB	lab(70.86, -8.04, -36.92)
CIE-LCH	lch(70.86, 37.79, 257.71°)
OKLab	oklab(74.5% -0.0553 -0.1036)
OKLCH	oklch(74.5% 0.117 241.9)
XYZ	xyz(37.3918, 41.9882, 88.5552)
Luminance	0.4199 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B5F0 #F09E63

analogous

#63F0E4 #63B5F0 #636FF0

triadic

#63B5F0 #F063B5 #B5F063

tetradic

#63B5F0 #E463F0 #F09E63 #6FF063

square

#63B5F0 #E463F0 #F09E63 #6FF063

split-complementary

#63B5F0 #F0636F #F0E463

monochromatic

#137BC6 #2B9BEB #63B5F0 #9BCFF5 #D3EAFB

Accessibility & contrast

On white

2.23

#63B5F0 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.40

#63B5F0 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B5F0

9.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B5F0	#FFFFFF	#000000	##000000
##63B5F0	1.00	2.23	9.40	9.40
#FFFFFF	2.23	1.00	21.00	21.00
#000000	9.40	21.00	1.00	1.00
##000000	9.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BB5F3

Deuteranopia (green-blind)

#88A7EF

Tritanopia (blue-blind)

#00C4C9

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #63b5f0;
/* rgb */ color: rgb(99, 181, 240);
/* oklch */ color: oklch(74.5% 0.117 241.9);

Tailwind

colors: {
  custom: {
    50: '#9acbf5',
    500: '#63b5f0',
    950: '#000000',
  },
}

SCSS

$custom: #63b5f0;
$custom-light: #9acbf5;
$custom-dark: #000000;

JSON

{
  "hex": "#63b5f0",
  "rgb": {
    "r": 99,
    "g": 181,
    "b": 240
  },
  "hsl": {
    "h": 205.106,
    "s": 82.456,
    "l": 66.471
  },
  "oklch": {
    "l": 0.74499,
    "c": 0.1174,
    "h": 241.9
  },
  "luminance": 0.41992
}

Semantic roles & 50–950 ramp

primary

#63B5F0

secondary

#EED4C1

accent

#6107DF

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #63B5F0

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

Preview Lab → · Contrast checker → · Palette generator →