#63B5EF#63B5EF

#63B5EF is a light, moderate cyan. Relative luminance 0.419; OKLCH L 74.5% C 0.116 H 241.5°. Best body text is #000000 at 9.39:1 contrast (WCAG AA passes).

Color values

HEX	#63B5EF
RGB	rgb(99, 181, 239)
HSL	hsl(205, 81%, 66%)
HSV	hsv(205, 59%, 94%)
CMYK	cmyk(58.6%, 24.3%, 0%, 6.3%)
CIE-LAB	lab(70.82, -8.35, -36.44)
CIE-LCH	lch(70.82, 37.39, 257.10°)
OKLab	oklab(74.45% -0.0556 -0.1022)
OKLCH	oklch(74.45% 0.116 241.5)
XYZ	xyz(37.2437, 41.9289, 87.7750)
Luminance	0.4193 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B5EF #EF9D63

analogous

#63EFE3 #63B5EF #636FEF

triadic

#63B5EF #EF63B5 #B5EF63

tetradic

#63B5EF #E363EF #EF9D63 #6FEF63

square

#63B5EF #E363EF #EF9D63 #6FEF63

split-complementary

#63B5EF #EF636F #EFE363

monochromatic

#147BC4 #2B9BE9 #63B5EF #9BCFF5 #D2EAFA

Accessibility & contrast

On white

2.24

#63B5EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.39

#63B5EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B5EF

9.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B5EF	#FFFFFF	#000000	##000000
##63B5EF	1.00	2.24	9.39	9.39
#FFFFFF	2.24	1.00	21.00	21.00
#000000	9.39	21.00	1.00	1.00
##000000	9.39	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BB5F2

Deuteranopia (green-blind)

#88A7EE

Tritanopia (blue-blind)

#00C3C9

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #63b5ef;
/* rgb */ color: rgb(99, 181, 239);
/* oklch */ color: oklch(74.5% 0.116 241.5);

Tailwind

colors: {
  custom: {
    50: '#9acbf4',
    500: '#63b5ef',
    950: '#000000',
  },
}

SCSS

$custom: #63b5ef;
$custom-light: #9acbf4;
$custom-dark: #000000;

JSON

{
  "hex": "#63b5ef",
  "rgb": {
    "r": 99,
    "g": 181,
    "b": 239
  },
  "hsl": {
    "h": 204.857,
    "s": 81.395,
    "l": 66.275
  },
  "oklch": {
    "l": 0.74454,
    "c": 0.11634,
    "h": 241.5
  },
  "luminance": 0.41932
}

Semantic roles & 50–950 ramp

primary

#63B5EF

secondary

#EED3C0

accent

#6008DE

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #63B5EF

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

Preview Lab → · Contrast checker → · Palette generator →