#63B5F3#63B5F3

#63B5F3 is a light, vivid cyan. Relative luminance 0.422; OKLCH L 74.6% C 0.121 H 243.2°. Best body text is #000000 at 9.43:1 contrast (WCAG AA passes).

Color values

HEX	#63B5F3
RGB	rgb(99, 181, 243)
HSL	hsl(206, 86%, 67%)
HSV	hsv(206, 59%, 95%)
CMYK	cmyk(59.3%, 25.5%, 0%, 4.7%)
CIE-LAB	lab(70.99, -7.11, -38.36)
CIE-LCH	lch(70.99, 39.01, 259.49°)
OKLab	oklab(74.64% -0.0543 -0.1077)
OKLCH	oklch(74.64% 0.121 243.2)
XYZ	xyz(37.8411, 42.1679, 90.9217)
Luminance	0.4217 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#63B5F3 #F3A163

analogous

#63F3E9 #63B5F3 #636DF3

triadic

#63B5F3 #F363B5 #B5F363

tetradic

#63B5F3 #E963F3 #F3A163 #6DF363

square

#63B5F3 #E963F3 #F3A163 #6DF363

split-complementary

#63B5F3 #F3636D #F3E963

monochromatic

#107BCC #2A9AEF #63B5F3 #9CD0F7 #D5EBFC

Accessibility & contrast

On white

2.23

#63B5F3 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.43

#63B5F3 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #63B5F3

9.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##63B5F3	#FFFFFF	#000000	##000000
##63B5F3	1.00	2.23	9.43	9.43
#FFFFFF	2.23	1.00	21.00	21.00
#000000	9.43	21.00	1.00	1.00
##000000	9.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9AB6F6

Deuteranopia (green-blind)

#86A7F2

Tritanopia (blue-blind)

#00C4CA

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #63b5f3;
/* rgb */ color: rgb(99, 181, 243);
/* oklch */ color: oklch(74.6% 0.121 243.2);

Tailwind

colors: {
  custom: {
    50: '#9acbf7',
    500: '#63b5f3',
    950: '#000000',
  },
}

SCSS

$custom: #63b5f3;
$custom-light: #9acbf7;
$custom-dark: #000000;

JSON

{
  "hex": "#63b5f3",
  "rgb": {
    "r": 99,
    "g": 181,
    "b": 243
  },
  "hsl": {
    "h": 205.833,
    "s": 85.714,
    "l": 67.059
  },
  "oklch": {
    "l": 0.74638,
    "c": 0.12064,
    "h": 243.2
  },
  "luminance": 0.42171
}

Semantic roles & 50–950 ramp

primary

#63B5F3

secondary

#F0D6C2

accent

#6303E2

background

#FAFCFF

surface

#F4F8FE

border

#CED1D6

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #63B5F3

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

Preview Lab → · Contrast checker → · Palette generator →