#63B3E5#63B3E5

#63B3E5 is a light, moderate cyan. Relative luminance 0.406; OKLCH L 73.6% C 0.107 H 238.0°. Best body text is #000000 at 9.11:1 contrast (WCAG AA passes).

Color values

HEX	#63B3E5
RGB	rgb(99, 179, 229)
HSL	hsl(203, 71%, 64%)
HSV	hsv(203, 57%, 90%)
CMYK	cmyk(56.8%, 21.8%, 0%, 10.2%)
CIE-LAB	lab(69.86, -10.32, -32.50)
CIE-LCH	lch(69.86, 34.10, 252.38°)
OKLab	oklab(73.56% -0.0567 -0.0909)
OKLCH	oklch(73.56% 0.107 238)
XYZ	xyz(35.4033, 40.5468, 80.0742)
Luminance	0.4055 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B3E5 #E59563

analogous

#63E5D6 #63B3E5 #6372E5

triadic

#63B3E5 #E563B3 #B3E563

tetradic

#63B3E5 #D663E5 #E59563 #72E563

square

#63B3E5 #D663E5 #E59563 #72E563

split-complementary

#63B3E5 #E56372 #E5D663

monochromatic

#1D78B0 #2F99DC #63B3E5 #97CDEE #CCE6F6

Accessibility & contrast

On white

2.31

#63B3E5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.11

#63B3E5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B3E5

9.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B3E5	#FFFFFF	#000000	##000000
##63B3E5	1.00	2.31	9.11	9.11
#FFFFFF	2.31	1.00	21.00	21.00
#000000	9.11	21.00	1.00	1.00
##000000	9.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9CB2E7

Deuteranopia (green-blind)

#8AA5E4

Tritanopia (blue-blind)

#00C0C4

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #63b3e5;
/* rgb */ color: rgb(99, 179, 229);
/* oklch */ color: oklch(73.6% 0.107 238.0);

Tailwind

colors: {
  custom: {
    50: '#99c9ed',
    500: '#63b3e5',
    950: '#000000',
  },
}

SCSS

$custom: #63b3e5;
$custom-light: #99c9ed;
$custom-dark: #000000;

JSON

{
  "hex": "#63b3e5",
  "rgb": {
    "r": 99,
    "g": 179,
    "b": 229
  },
  "hsl": {
    "h": 203.077,
    "s": 71.429,
    "l": 64.314
  },
  "oklch": {
    "l": 0.73557,
    "c": 0.10711,
    "h": 238
  },
  "luminance": 0.4055
}

Semantic roles & 50–950 ramp

primary

#63B3E5

secondary

#E8CDBB

accent

#5C12D3

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0F1316

muted

#7E8284

Preview Lab

Preview with #63B3E5

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

Preview Lab → · Contrast checker → · Palette generator →