#63C5EE#63C5EE

#63C5EE is a light, moderate cyan. Relative luminance 0.488; OKLCH L 78.0% C 0.109 H 228.0°. Best body text is #000000 at 10.75:1 contrast (WCAG AA passes).

Color values

HEX	#63C5EE
RGB	rgb(99, 197, 238)
HSL	hsl(198, 80%, 66%)
HSV	hsv(198, 58%, 93%)
CMYK	cmyk(58.4%, 17.2%, 0%, 6.7%)
CIE-LAB	lab(75.30, -17.16, -28.99)
CIE-LCH	lch(75.30, 33.69, 239.38°)
OKLab	oklab(78% -0.0729 -0.0808)
OKLCH	oklch(78% 0.109 228)
XYZ	xyz(40.5385, 48.7543, 88.1465)
Luminance	0.4876 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63C5EE #EE8C63

analogous

#63EED1 #63C5EE #637FEE

triadic

#63C5EE #EE63C5 #C5EE63

tetradic

#63C5EE #D163EE #EE8C63 #7FEE63

square

#63C5EE #D163EE #EE8C63 #7FEE63

split-complementary

#63C5EE #EE637F #EED163

monochromatic

#158FC2 #2CB0E8 #63C5EE #9ADAF4 #D1EEFA

Accessibility & contrast

On white

1.95

#63C5EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.75

#63C5EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63C5EE

10.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63C5EE	#FFFFFF	#000000	##000000
##63C5EE	1.00	1.95	10.75	10.75
#FFFFFF	1.95	1.00	21.00	21.00
#000000	10.75	21.00	1.00	1.00
##000000	10.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B0C2F0

Deuteranopia (green-blind)

#9CB3ED

Tritanopia (blue-blind)

#00D1D2

Achromatopsia (no color)

#B9B9B9

Design tokens & code

CSS

--color: #63c5ee;
/* rgb */ color: rgb(99, 197, 238);
/* oklch */ color: oklch(78.0% 0.109 228.0);

Tailwind

colors: {
  custom: {
    50: '#9bd6f3',
    500: '#63c5ee',
    950: '#000000',
  },
}

SCSS

$custom: #63c5ee;
$custom-light: #9bd6f3;
$custom-dark: #000000;

JSON

{
  "hex": "#63c5ee",
  "rgb": {
    "r": 99,
    "g": 197,
    "b": 238
  },
  "hsl": {
    "h": 197.698,
    "s": 80.347,
    "l": 66.078
  },
  "oklch": {
    "l": 0.77996,
    "c": 0.10881,
    "h": 228
  },
  "luminance": 0.48758
}

Semantic roles & 50–950 ramp

primary

#63C5EE

secondary

#EDCDC0

accent

#4709DD

background

#FAFDFE

surface

#F4FAFD

border

#CED3D5

text

#0F1417

muted

#7F8385

Preview Lab

Preview with #63C5EE

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

Preview Lab → · Contrast checker → · Palette generator →