#63B9EF#63B9EF

#63B9EF is a light, moderate cyan. Relative luminance 0.436; OKLCH L 75.3% C 0.114 H 238.4°. Best body text is #000000 at 9.72:1 contrast (WCAG AA passes).

Color values

HEX	#63B9EF
RGB	rgb(99, 185, 239)
HSL	hsl(203, 81%, 66%)
HSV	hsv(203, 59%, 94%)
CMYK	cmyk(58.6%, 22.6%, 0%, 6.3%)
CIE-LAB	lab(71.95, -10.51, -34.70)
CIE-LCH	lch(71.95, 36.26, 253.14°)
OKLab	oklab(75.34% -0.0598 -0.0972)
OKLCH	oklch(75.34% 0.114 238.4)
XYZ	xyz(38.0687, 43.5790, 88.0500)
Luminance	0.4358 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B9EF #EF9963

analogous

#63EFDF #63B9EF #6373EF

triadic

#63B9EF #EF63B9 #B9EF63

tetradic

#63B9EF #DF63EF #EF9963 #73EF63

square

#63B9EF #DF63EF #EF9963 #73EF63

split-complementary

#63B9EF #EF6373 #EFDF63

monochromatic

#1480C4 #2BA0E9 #63B9EF #9BD2F5 #D2EBFA

Accessibility & contrast

On white

2.16

#63B9EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.72

#63B9EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B9EF

9.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B9EF	#FFFFFF	#000000	##000000
##63B9EF	1.00	2.16	9.72	9.72
#FFFFFF	2.16	1.00	21.00	21.00
#000000	9.72	21.00	1.00	1.00
##000000	9.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A0B8F2

Deuteranopia (green-blind)

#8DAAEE

Tritanopia (blue-blind)

#00C7CB

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #63b9ef;
/* rgb */ color: rgb(99, 185, 239);
/* oklch */ color: oklch(75.3% 0.114 238.4);

Tailwind

colors: {
  custom: {
    50: '#9acef4',
    500: '#63b9ef',
    950: '#000000',
  },
}

SCSS

$custom: #63b9ef;
$custom-light: #9acef4;
$custom-dark: #000000;

JSON

{
  "hex": "#63b9ef",
  "rgb": {
    "r": 99,
    "g": 185,
    "b": 239
  },
  "hsl": {
    "h": 203.143,
    "s": 81.395,
    "l": 66.275
  },
  "oklch": {
    "l": 0.75344,
    "c": 0.11411,
    "h": 238.4
  },
  "luminance": 0.43583
}

Semantic roles & 50–950 ramp

primary

#63B9EF

secondary

#EED2C0

accent

#5A08DE

background

#FAFCFE

surface

#F3F9FD

border

#CDD2D5

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #63B9EF

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

Preview Lab → · Contrast checker → · Palette generator →