#63B4E9#63B4E9

#63B4E9 is a light, moderate cyan. Relative luminance 0.412; OKLCH L 74.0% C 0.111 H 239.3°. Best body text is #000000 at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#63B4E9
RGB	rgb(99, 180, 233)
HSL	hsl(204, 75%, 65%)
HSV	hsv(204, 58%, 91%)
CMYK	cmyk(57.5%, 22.7%, 0%, 8.6%)
CIE-LAB	lab(70.30, -9.65, -33.99)
CIE-LCH	lch(70.30, 35.34, 254.16°)
OKLab	oklab(73.96% -0.0565 -0.0952)
OKLCH	oklch(73.96% 0.111 239.3)
XYZ	xyz(36.1693, 41.1750, 83.1165)
Luminance	0.4118 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B4E9 #E99863

analogous

#63E9DB #63B4E9 #6371E9

triadic

#63B4E9 #E963B4 #B4E963

tetradic

#63B4E9 #DB63E9 #E99863 #71E963

square

#63B4E9 #DB63E9 #E99863 #71E963

split-complementary

#63B4E9 #E96371 #E9DB63

monochromatic

#1A79B8 #2D9AE1 #63B4E9 #99CEF1 #CEE8F8

Accessibility & contrast

On white

2.27

#63B4E9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.24

#63B4E9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B4E9

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B4E9	#FFFFFF	#000000	##000000
##63B4E9	1.00	2.27	9.24	9.24
#FFFFFF	2.27	1.00	21.00	21.00
#000000	9.24	21.00	1.00	1.00
##000000	9.24	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9CB4EB

Deuteranopia (green-blind)

#8AA6E8

Tritanopia (blue-blind)

#00C1C6

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #63b4e9;
/* rgb */ color: rgb(99, 180, 233);
/* oklch */ color: oklch(74.0% 0.111 239.3);

Tailwind

colors: {
  custom: {
    50: '#99caf0',
    500: '#63b4e9',
    950: '#000000',
  },
}

SCSS

$custom: #63b4e9;
$custom-light: #99caf0;
$custom-dark: #000000;

JSON

{
  "hex": "#63b4e9",
  "rgb": {
    "r": 99,
    "g": 180,
    "b": 233
  },
  "hsl": {
    "h": 203.731,
    "s": 75.281,
    "l": 65.098
  },
  "oklch": {
    "l": 0.73959,
    "c": 0.11065,
    "h": 239.3
  },
  "luminance": 0.41178
}

Semantic roles & 50–950 ramp

primary

#63B4E9

secondary

#EBCFBD

accent

#5E0ED7

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #63B4E9

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

Preview Lab → · Contrast checker → · Palette generator →