#63B3EB#63B3EB

#63B3EB is a light, moderate cyan. Relative luminance 0.409; OKLCH L 73.8% C 0.113 H 241.1°. Best body text is #000000 at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#63B3EB
RGB	rgb(99, 179, 235)
HSL	hsl(205, 77%, 65%)
HSV	hsv(205, 58%, 92%)
CMYK	cmyk(57.9%, 23.8%, 0%, 7.8%)
CIE-LAB	lab(70.10, -8.49, -35.39)
CIE-LCH	lch(70.10, 36.40, 256.51°)
OKLab	oklab(73.83% -0.0547 -0.0992)
OKLCH	oklch(73.83% 0.113 241.1)
XYZ	xyz(36.2555, 40.8877, 84.5626)
Luminance	0.4089 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B3EB #EB9B63

analogous

#63EBDF #63B3EB #636FEB

triadic

#63B3EB #EB63B3 #B3EB63

tetradic

#63B3EB #DF63EB #EB9B63 #6FEB63

square

#63B3EB #DF63EB #EB9B63 #6FEB63

split-complementary

#63B3EB #EB636F #EBDF63

monochromatic

#1878BC #2D99E4 #63B3EB #99CDF2 #CFE8F9

Accessibility & contrast

On white

2.29

#63B3EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.18

#63B3EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B3EB

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B3EB	#FFFFFF	#000000	##000000
##63B3EB	1.00	2.29	9.18	9.18
#FFFFFF	2.29	1.00	21.00	21.00
#000000	9.18	21.00	1.00	1.00
##000000	9.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9AB3EE

Deuteranopia (green-blind)

#88A5EA

Tritanopia (blue-blind)

#00C1C6

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #63b3eb;
/* rgb */ color: rgb(99, 179, 235);
/* oklch */ color: oklch(73.8% 0.113 241.1);

Tailwind

colors: {
  custom: {
    50: '#99c9f1',
    500: '#63b3eb',
    950: '#000000',
  },
}

SCSS

$custom: #63b3eb;
$custom-light: #99c9f1;
$custom-dark: #000000;

JSON

{
  "hex": "#63b3eb",
  "rgb": {
    "r": 99,
    "g": 179,
    "b": 235
  },
  "hsl": {
    "h": 204.706,
    "s": 77.273,
    "l": 65.49
  },
  "oklch": {
    "l": 0.73827,
    "c": 0.11329,
    "h": 241.1
  },
  "luminance": 0.40891
}

Semantic roles & 50–950 ramp

primary

#63B3EB

secondary

#ECD1BE

accent

#610CDA

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #63B3EB

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

Preview Lab → · Contrast checker → · Palette generator →