#63B3E9#63B3E9

#63B3E9 is a light, moderate cyan. Relative luminance 0.408; OKLCH L 73.7% C 0.111 H 240.1°. Best body text is #000000 at 9.16:1 contrast (WCAG AA passes).

Color values

HEX	#63B3E9
RGB	rgb(99, 179, 233)
HSL	hsl(204, 75%, 65%)
HSV	hsv(204, 58%, 91%)
CMYK	cmyk(57.5%, 23.2%, 0%, 8.6%)
CIE-LAB	lab(70.02, -9.10, -34.43)
CIE-LCH	lch(70.02, 35.61, 255.19°)
OKLab	oklab(73.74% -0.0554 -0.0964)
OKLCH	oklch(73.74% 0.111 240.1)
XYZ	xyz(35.9682, 40.7728, 83.0494)
Luminance	0.4078 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B3E9 #E99963

analogous

#63E9DC #63B3E9 #6370E9

triadic

#63B3E9 #E963B3 #B3E963

tetradic

#63B3E9 #DC63E9 #E99963 #70E963

square

#63B3E9 #DC63E9 #E99963 #70E963

split-complementary

#63B3E9 #E96370 #E9DC63

monochromatic

#1A78B8 #2D99E1 #63B3E9 #99CDF1 #CEE7F8

Accessibility & contrast

On white

2.29

#63B3E9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.16

#63B3E9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B3E9

9.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B3E9	#FFFFFF	#000000	##000000
##63B3E9	1.00	2.29	9.16	9.16
#FFFFFF	2.29	1.00	21.00	21.00
#000000	9.16	21.00	1.00	1.00
##000000	9.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BB3EC

Deuteranopia (green-blind)

#88A5E8

Tritanopia (blue-blind)

#00C0C5

Achromatopsia (no color)

#ABABAB

Design tokens & code

CSS

--color: #63b3e9;
/* rgb */ color: rgb(99, 179, 233);
/* oklch */ color: oklch(73.7% 0.111 240.1);

Tailwind

colors: {
  custom: {
    50: '#99c9f0',
    500: '#63b3e9',
    950: '#000000',
  },
}

SCSS

$custom: #63b3e9;
$custom-light: #99c9f0;
$custom-dark: #000000;

JSON

{
  "hex": "#63b3e9",
  "rgb": {
    "r": 99,
    "g": 179,
    "b": 233
  },
  "hsl": {
    "h": 204.179,
    "s": 75.281,
    "l": 65.098
  },
  "oklch": {
    "l": 0.73736,
    "c": 0.1112,
    "h": 240.1
  },
  "luminance": 0.40776
}

Semantic roles & 50–950 ramp

primary

#63B3E9

secondary

#EBCFBD

accent

#5F0ED7

background

#FAFCFE

surface

#F3F8FD

border

#CDD1D5

text

#0F1316

muted

#7F8284

Preview Lab

Preview with #63B3E9

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

Preview Lab → · Contrast checker → · Palette generator →