#63B9EB#63B9EB

#63B9EB is a light, moderate cyan. Relative luminance 0.433; OKLCH L 75.2% C 0.110 H 236.3°. Best body text is #000000 at 9.67:1 contrast (WCAG AA passes).

Color values

HEX	#63B9EB
RGB	rgb(99, 185, 235)
HSL	hsl(202, 77%, 65%)
HSV	hsv(202, 58%, 92%)
CMYK	cmyk(57.9%, 21.3%, 0%, 7.8%)
CIE-LAB	lab(71.79, -11.73, -32.77)
CIE-LCH	lch(71.79, 34.81, 250.31°)
OKLab	oklab(75.17% -0.0612 -0.0916)
OKLCH	oklch(75.17% 0.11 236.3)
XYZ	xyz(37.4843, 43.3452, 84.9722)
Luminance	0.4335 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B9EB #EB9563

analogous

#63EBD9 #63B9EB #6375EB

triadic

#63B9EB #EB63B9 #B9EB63

tetradic

#63B9EB #D963EB #EB9563 #75EB63

square

#63B9EB #D963EB #EB9563 #75EB63

split-complementary

#63B9EB #EB6375 #EBD963

monochromatic

#187FBC #2DA1E4 #63B9EB #99D1F2 #CFEAF9

Accessibility & contrast

On white

2.17

#63B9EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.67

#63B9EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B9EB

9.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B9EB	#FFFFFF	#000000	##000000
##63B9EB	1.00	2.17	9.67	9.67
#FFFFFF	2.17	1.00	21.00	21.00
#000000	9.67	21.00	1.00	1.00
##000000	9.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A2B8ED

Deuteranopia (green-blind)

#8FAAEA

Tritanopia (blue-blind)

#00C6CA

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #63b9eb;
/* rgb */ color: rgb(99, 185, 235);
/* oklch */ color: oklch(75.2% 0.110 236.3);

Tailwind

colors: {
  custom: {
    50: '#9acef1',
    500: '#63b9eb',
    950: '#000000',
  },
}

SCSS

$custom: #63b9eb;
$custom-light: #9acef1;
$custom-dark: #000000;

JSON

{
  "hex": "#63b9eb",
  "rgb": {
    "r": 99,
    "g": 185,
    "b": 235
  },
  "hsl": {
    "h": 202.059,
    "s": 77.273,
    "l": 65.49
  },
  "oklch": {
    "l": 0.75167,
    "c": 0.11017,
    "h": 236.3
  },
  "luminance": 0.43349
}

Semantic roles & 50–950 ramp

primary

#63B9EB

secondary

#ECCFBE

accent

#580CDA

background

#FAFCFE

surface

#F3F9FD

border

#CDD2D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #63B9EB

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

Preview Lab → · Contrast checker → · Palette generator →