#63B9F5#63B9F5

#63B9F5 is a light, vivid cyan. Relative luminance 0.439; OKLCH L 75.6% C 0.120 H 241.2°. Best body text is #000000 at 9.79:1 contrast (WCAG AA passes).

Color values

HEX	#63B9F5
RGB	rgb(99, 185, 245)
HSL	hsl(205, 88%, 67%)
HSV	hsv(205, 60%, 96%)
CMYK	cmyk(59.6%, 24.5%, 0%, 3.9%)
CIE-LAB	lab(72.19, -8.67, -37.57)
CIE-LCH	lch(72.19, 38.56, 257.00°)
OKLab	oklab(75.61% -0.0579 -0.1054)
OKLCH	oklch(75.61% 0.12 241.2)
XYZ	xyz(38.9698, 43.9395, 92.7960)
Luminance	0.4394 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B9F5 #F59F63

analogous

#63F5E8 #63B9F5 #6370F5

triadic

#63B9F5 #F563B9 #B9F563

tetradic

#63B9F5 #E863F5 #F59F63 #70F563

square

#63B9F5 #E863F5 #F59F63 #70F563

split-complementary

#63B9F5 #F56370 #F5E863

monochromatic

#0D80D0 #299FF1 #63B9F5 #9DD3F9 #D6EDFC

Accessibility & contrast

On white

2.15

#63B9F5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.79

#63B9F5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B9F5

9.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B9F5	#FFFFFF	#000000	##000000
##63B9F5	1.00	2.15	9.79	9.79
#FFFFFF	2.15	1.00	21.00	21.00
#000000	9.79	21.00	1.00	1.00
##000000	9.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EB9F8

Deuteranopia (green-blind)

#8AAAF4

Tritanopia (blue-blind)

#00C8CD

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #63b9f5;
/* rgb */ color: rgb(99, 185, 245);
/* oklch */ color: oklch(75.6% 0.120 241.2);

Tailwind

colors: {
  custom: {
    50: '#9bcdf8',
    500: '#63b9f5',
    950: '#000000',
  },
}

SCSS

$custom: #63b9f5;
$custom-light: #9bcdf8;
$custom-dark: #000000;

JSON

{
  "hex": "#63b9f5",
  "rgb": {
    "r": 99,
    "g": 185,
    "b": 245
  },
  "hsl": {
    "h": 204.658,
    "s": 87.952,
    "l": 67.451
  },
  "oklch": {
    "l": 0.75615,
    "c": 0.12027,
    "h": 241.2
  },
  "luminance": 0.43943
}

Semantic roles & 50–950 ramp

primary

#63B9F5

secondary

#F1D6C3

accent

#5E01E5

background

#FAFCFF

surface

#F4F9FF

border

#CED2D7

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #63B9F5

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

Preview Lab → · Contrast checker → · Palette generator →