#63B5EC#63B5EC

#63B5EC is a light, moderate cyan. Relative luminance 0.418; OKLCH L 74.3% C 0.113 H 240.0°. Best body text is #000000 at 9.35:1 contrast (WCAG AA passes).

Color values

HEX	#63B5EC
RGB	rgb(99, 181, 236)
HSL	hsl(204, 78%, 66%)
HSV	hsv(204, 58%, 93%)
CMYK	cmyk(58.1%, 23.3%, 0%, 7.5%)
CIE-LAB	lab(70.70, -9.27, -35.00)
CIE-LCH	lch(70.70, 36.21, 255.16°)
OKLab	oklab(74.32% -0.0565 -0.098)
OKLCH	oklch(74.32% 0.113 240)
XYZ	xyz(36.8041, 41.7531, 85.4602)
Luminance	0.4176 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B5EC #EC9A63

analogous

#63ECDF #63B5EC #6370EC

triadic

#63B5EC #EC63B5 #B5EC63

tetradic

#63B5EC #DF63EC #EC9A63 #70EC63

square

#63B5EC #DF63EC #EC9A63 #70EC63

split-complementary

#63B5EC #EC6370 #ECDF63

monochromatic

#177BBE #2C9BE5 #63B5EC #9ACFF3 #D0E9F9

Accessibility & contrast

On white

2.25

#63B5EC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.35

#63B5EC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B5EC

9.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B5EC	#FFFFFF	#000000	##000000
##63B5EC	1.00	2.25	9.35	9.35
#FFFFFF	2.25	1.00	21.00	21.00
#000000	9.35	21.00	1.00	1.00
##000000	9.35	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9CB5EF

Deuteranopia (green-blind)

#8AA7EB

Tritanopia (blue-blind)

#00C3C8

Achromatopsia (no color)

#ADADAD

Design tokens & code

CSS

--color: #63b5ec;
/* rgb */ color: rgb(99, 181, 236);
/* oklch */ color: oklch(74.3% 0.113 240.0);

Tailwind

colors: {
  custom: {
    50: '#9acbf2',
    500: '#63b5ec',
    950: '#000000',
  },
}

SCSS

$custom: #63b5ec;
$custom-light: #9acbf2;
$custom-dark: #000000;

JSON

{
  "hex": "#63b5ec",
  "rgb": {
    "r": 99,
    "g": 181,
    "b": 236
  },
  "hsl": {
    "h": 204.088,
    "s": 78.286,
    "l": 65.686
  },
  "oklch": {
    "l": 0.74317,
    "c": 0.11319,
    "h": 240
  },
  "luminance": 0.41757
}

Semantic roles & 50–950 ramp

primary

#63B5EC

secondary

#ECD1BF

accent

#5E0BDB

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #63B5EC

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

Preview Lab → · Contrast checker → · Palette generator →