#63B4E5#63B4E5

#63B4E5 is a light, moderate cyan. Relative luminance 0.410; OKLCH L 73.8% C 0.107 H 237.2°. Best body text is #000000 at 9.19:1 contrast (WCAG AA passes).

Color values

HEX	#63B4E5
RGB	rgb(99, 180, 229)
HSL	hsl(203, 71%, 64%)
HSV	hsv(203, 57%, 90%)
CMYK	cmyk(56.8%, 21.4%, 0%, 10.2%)
CIE-LAB	lab(70.14, -10.86, -32.06)
CIE-LCH	lch(70.14, 33.85, 251.29°)
OKLab	oklab(73.78% -0.0578 -0.0896)
OKLCH	oklch(73.78% 0.107 237.2)
XYZ	xyz(35.6044, 40.9491, 80.1412)
Luminance	0.4095 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B4E5 #E59463

analogous

#63E5D5 #63B4E5 #6373E5

triadic

#63B4E5 #E563B4 #B4E563

tetradic

#63B4E5 #D563E5 #E59463 #73E563

square

#63B4E5 #D563E5 #E59463 #73E563

split-complementary

#63B4E5 #E56373 #E5D563

monochromatic

#1D79B0 #2F9BDC #63B4E5 #97CDEE #CCE6F6

Accessibility & contrast

On white

2.28

#63B4E5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.19

#63B4E5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B4E5

9.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B4E5	#FFFFFF	#000000	##000000
##63B4E5	1.00	2.28	9.19	9.19
#FFFFFF	2.28	1.00	21.00	21.00
#000000	9.19	21.00	1.00	1.00
##000000	9.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DB3E7

Deuteranopia (green-blind)

#8BA6E4

Tritanopia (blue-blind)

#00C1C4

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #63b4e5;
/* rgb */ color: rgb(99, 180, 229);
/* oklch */ color: oklch(73.8% 0.107 237.2);

Tailwind

colors: {
  custom: {
    50: '#99caed',
    500: '#63b4e5',
    950: '#000000',
  },
}

SCSS

$custom: #63b4e5;
$custom-light: #99caed;
$custom-dark: #000000;

JSON

{
  "hex": "#63b4e5",
  "rgb": {
    "r": 99,
    "g": 180,
    "b": 229
  },
  "hsl": {
    "h": 202.615,
    "s": 71.429,
    "l": 64.314
  },
  "oklch": {
    "l": 0.73782,
    "c": 0.10663,
    "h": 237.2
  },
  "luminance": 0.40952
}

Semantic roles & 50–950 ramp

primary

#63B4E5

secondary

#E8CCBB

accent

#5B12D3

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0F1316

muted

#7E8284

Preview Lab

Preview with #63B4E5

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

Preview Lab → · Contrast checker → · Palette generator →