#63B9DF#63B9DF

#63B9DF is a light, moderate cyan. Relative luminance 0.427; OKLCH L 74.7% C 0.099 H 228.9°. Best body text is #000000 at 9.54:1 contrast (WCAG AA passes).

Color values

HEX	#63B9DF
RGB	rgb(99, 185, 223)
HSL	hsl(198, 66%, 63%)
HSV	hsv(198, 56%, 87%)
CMYK	cmyk(55.6%, 17%, 0%, 12.5%)
CIE-LAB	lab(71.33, -15.32, -26.95)
CIE-LCH	lch(71.33, 31.00, 240.39°)
OKLab	oklab(74.66% -0.0653 -0.075)
OKLCH	oklch(74.66% 0.099 228.9)
XYZ	xyz(35.8088, 42.6750, 76.1478)
Luminance	0.4268 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B9DF #DF8963

analogous

#63DFC7 #63B9DF #637BDF

triadic

#63B9DF #DF63B9 #B9DF63

tetradic

#63B9DF #C763DF #DF8963 #7BDF63

square

#63B9DF #C763DF #DF8963 #7BDF63

split-complementary

#63B9DF #DF637B #DFC763

monochromatic

#227DA6 #30A2D5 #63B9DF #96D0E9 #C9E7F4

Accessibility & contrast

On white

2.20

#63B9DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.54

#63B9DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B9DF

9.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B9DF	#FFFFFF	#000000	##000000
##63B9DF	1.00	2.20	9.54	9.54
#FFFFFF	2.20	1.00	21.00	21.00
#000000	9.54	21.00	1.00	1.00
##000000	9.54	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A5B6E1

Deuteranopia (green-blind)

#94A9DF

Tritanopia (blue-blind)

#00C4C5

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #63b9df;
/* rgb */ color: rgb(99, 185, 223);
/* oklch */ color: oklch(74.7% 0.099 228.9);

Tailwind

colors: {
  custom: {
    50: '#98cee9',
    500: '#63b9df',
    950: '#000000',
  },
}

SCSS

$custom: #63b9df;
$custom-light: #98cee9;
$custom-dark: #000000;

JSON

{
  "hex": "#63b9df",
  "rgb": {
    "r": 99,
    "g": 185,
    "b": 223
  },
  "hsl": {
    "h": 198.387,
    "s": 65.957,
    "l": 63.137
  },
  "oklch": {
    "l": 0.74655,
    "c": 0.09948,
    "h": 228.9
  },
  "luminance": 0.42678
}

Semantic roles & 50–950 ramp

primary

#63B9DF

secondary

#E5C6B9

accent

#4F18CE

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0F1316

muted

#7E8284

Preview Lab

Preview with #63B9DF

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

Preview Lab → · Contrast checker → · Palette generator →