#63B9ED#63B9ED

#63B9ED is a light, moderate cyan. Relative luminance 0.435; OKLCH L 75.3% C 0.112 H 237.4°. Best body text is #000000 at 9.69:1 contrast (WCAG AA passes).

Color values

HEX	#63B9ED
RGB	rgb(99, 185, 237)
HSL	hsl(203, 79%, 66%)
HSV	hsv(203, 58%, 93%)
CMYK	cmyk(58.2%, 21.9%, 0%, 7.1%)
CIE-LAB	lab(71.87, -11.12, -33.74)
CIE-LCH	lch(71.87, 35.52, 251.75°)
OKLab	oklab(75.26% -0.0605 -0.0944)
OKLCH	oklch(75.26% 0.112 237.4)
XYZ	xyz(37.7749, 43.4615, 86.5025)
Luminance	0.4346 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B9ED #ED9763

analogous

#63EDDC #63B9ED #6374ED

triadic

#63B9ED #ED63B9 #B9ED63

tetradic

#63B9ED #DC63ED #ED9763 #74ED63

square

#63B9ED #DC63ED #ED9763 #74ED63

split-complementary

#63B9ED #ED6374 #EDDC63

monochromatic

#1680C0 #2CA0E7 #63B9ED #9AD2F3 #D1EAFA

Accessibility & contrast

On white

2.17

#63B9ED on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.69

#63B9ED on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B9ED

9.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B9ED	#FFFFFF	#000000	##000000
##63B9ED	1.00	2.17	9.69	9.69
#FFFFFF	2.17	1.00	21.00	21.00
#000000	9.69	21.00	1.00	1.00
##000000	9.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A1B8EF

Deuteranopia (green-blind)

#8EAAEC

Tritanopia (blue-blind)

#00C6CA

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #63b9ed;
/* rgb */ color: rgb(99, 185, 237);
/* oklch */ color: oklch(75.3% 0.112 237.4);

Tailwind

colors: {
  custom: {
    50: '#9acef3',
    500: '#63b9ed',
    950: '#000000',
  },
}

SCSS

$custom: #63b9ed;
$custom-light: #9acef3;
$custom-dark: #000000;

JSON

{
  "hex": "#63b9ed",
  "rgb": {
    "r": 99,
    "g": 185,
    "b": 237
  },
  "hsl": {
    "h": 202.609,
    "s": 79.31,
    "l": 65.882
  },
  "oklch": {
    "l": 0.75255,
    "c": 0.11211,
    "h": 237.4
  },
  "luminance": 0.43465
}

Semantic roles & 50–950 ramp

primary

#63B9ED

secondary

#EDD0BF

accent

#590ADC

background

#FAFCFE

surface

#F3F9FD

border

#CDD2D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #63B9ED

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

Preview Lab → · Contrast checker → · Palette generator →