#63B9F3#63B9F3

#63B9F3 is a light, moderate cyan. Relative luminance 0.438; OKLCH L 75.5% C 0.118 H 240.3°. Best body text is #000000 at 9.76:1 contrast (WCAG AA passes).

Color values

HEX	#63B9F3
RGB	rgb(99, 185, 243)
HSL	hsl(204, 86%, 67%)
HSV	hsv(204, 59%, 95%)
CMYK	cmyk(59.3%, 23.9%, 0%, 4.7%)
CIE-LAB	lab(72.11, -9.29, -36.62)
CIE-LCH	lch(72.11, 37.78, 255.77°)
OKLab	oklab(75.52% -0.0585 -0.1027)
OKLCH	oklch(75.52% 0.118 240.3)
XYZ	xyz(38.6662, 43.8180, 91.1967)
Luminance	0.4382 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B9F3 #F39D63

analogous

#63F3E5 #63B9F3 #6371F3

triadic

#63B9F3 #F363B9 #B9F363

tetradic

#63B9F3 #E563F3 #F39D63 #71F363

square

#63B9F3 #E563F3 #F39D63 #71F363

split-complementary

#63B9F3 #F36371 #F3E563

monochromatic

#1080CC #2A9FEF #63B9F3 #9CD2F7 #D5ECFC

Accessibility & contrast

On white

2.15

#63B9F3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.76

#63B9F3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B9F3

9.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B9F3	#FFFFFF	#000000	##000000
##63B9F3	1.00	2.15	9.76	9.76
#FFFFFF	2.15	1.00	21.00	21.00
#000000	9.76	21.00	1.00	1.00
##000000	9.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9FB9F6

Deuteranopia (green-blind)

#8BAAF2

Tritanopia (blue-blind)

#00C7CD

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #63b9f3;
/* rgb */ color: rgb(99, 185, 243);
/* oklch */ color: oklch(75.5% 0.118 240.3);

Tailwind

colors: {
  custom: {
    50: '#9bcdf7',
    500: '#63b9f3',
    950: '#000000',
  },
}

SCSS

$custom: #63b9f3;
$custom-light: #9bcdf7;
$custom-dark: #000000;

JSON

{
  "hex": "#63b9f3",
  "rgb": {
    "r": 99,
    "g": 185,
    "b": 243
  },
  "hsl": {
    "h": 204.167,
    "s": 85.714,
    "l": 67.059
  },
  "oklch": {
    "l": 0.75524,
    "c": 0.11818,
    "h": 240.3
  },
  "luminance": 0.43822
}

Semantic roles & 50–950 ramp

primary

#63B9F3

secondary

#F0D4C2

accent

#5D03E2

background

#FAFCFF

surface

#F4F9FE

border

#CED2D6

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #63B9F3

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

Preview Lab → · Contrast checker → · Palette generator →