#63B3EF#63B3EF

#63B3EF is a light, moderate cyan. Relative luminance 0.411; OKLCH L 74.0% C 0.118 H 243.0°. Best body text is #000000 at 9.23:1 contrast (WCAG AA passes).

Color values

HEX	#63B3EF
RGB	rgb(99, 179, 239)
HSL	hsl(206, 81%, 66%)
HSV	hsv(206, 59%, 94%)
CMYK	cmyk(58.6%, 25.1%, 0%, 6.3%)
CIE-LAB	lab(70.26, -7.26, -37.32)
CIE-LCH	lch(70.26, 38.02, 258.99°)
OKLab	oklab(74.01% -0.0535 -0.1047)
OKLCH	oklch(74.01% 0.118 243)
XYZ	xyz(36.8399, 41.1214, 87.6404)
Luminance	0.4113 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B3EF #EF9F63

analogous

#63EFE5 #63B3EF #636DEF

triadic

#63B3EF #EF63B3 #B3EF63

tetradic

#63B3EF #E563EF #EF9F63 #6DEF63

square

#63B3EF #E563EF #EF9F63 #6DEF63

split-complementary

#63B3EF #EF636D #EFE563

monochromatic

#1478C4 #2B98E9 #63B3EF #9BCEF5 #D2E9FA

Accessibility & contrast

On white

2.28

#63B3EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.23

#63B3EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B3EF

9.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B3EF	#FFFFFF	#000000	##000000
##63B3EF	1.00	2.28	9.23	9.23
#FFFFFF	2.28	1.00	21.00	21.00
#000000	9.23	21.00	1.00	1.00
##000000	9.23	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#99B4F2

Deuteranopia (green-blind)

#86A6EE

Tritanopia (blue-blind)

#00C2C8

Achromatopsia (no color)

#ACACAC

Design tokens & code

CSS

--color: #63b3ef;
/* rgb */ color: rgb(99, 179, 239);
/* oklch */ color: oklch(74.0% 0.118 243.0);

Tailwind

colors: {
  custom: {
    50: '#9ac9f4',
    500: '#63b3ef',
    950: '#000000',
  },
}

SCSS

$custom: #63b3ef;
$custom-light: #9ac9f4;
$custom-dark: #000000;

JSON

{
  "hex": "#63b3ef",
  "rgb": {
    "r": 99,
    "g": 179,
    "b": 239
  },
  "hsl": {
    "h": 205.714,
    "s": 81.395,
    "l": 66.275
  },
  "oklch": {
    "l": 0.7401,
    "c": 0.11758,
    "h": 243
  },
  "luminance": 0.41125
}

Semantic roles & 50–950 ramp

primary

#63B3EF

secondary

#EED4C0

accent

#6308DE

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #63B3EF

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

Preview Lab → · Contrast checker → · Palette generator →