#3B63CB#3B63CB

#3B63CB is a mid, vivid blue. Relative luminance 0.142; OKLCH L 52.9% C 0.168 H 265.2°. Best body text is #FFFFFF at 5.48:1 contrast (WCAG AA passes).

Color values

HEX	#3B63CB
RGB	rgb(59, 99, 203)
HSL	hsl(223, 58%, 51%)
HSV	hsv(223, 71%, 80%)
CMYK	cmyk(70.9%, 51.2%, 0%, 20.4%)
CIE-LAB	lab(44.47, 21.31, -58.17)
CIE-LCH	lch(44.47, 61.95, 290.12°)
OKLab	oklab(52.89% -0.0139 -0.1672)
OKLCH	oklch(52.89% 0.168 265.2)
XYZ	xyz(17.0412, 14.1635, 58.3241)
Luminance	0.1416 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3B63CB #CBA33B

analogous

#3BABCB #3B63CB #5B3BCB

triadic

#3B63CB #CB3B63 #63CB3B

tetradic

#3B63CB #CB3BAB #CBA33B #3BCB5B

square

#3B63CB #CB3BAB #CBA33B #3BCB5B

split-complementary

#3B63CB #CB5B3B #ABCB3B

monochromatic

#1D346E #2A4A9F #3B63CB #6B89D8 #9CB0E5

Accessibility & contrast

On white

5.48

#3B63CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.83

#3B63CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3B63CB

5.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3B63CB	#FFFFFF	#000000	##FFFFFF
##3B63CB	1.00	5.48	3.83	5.48
#FFFFFF	5.48	1.00	21.00	1.00
#000000	3.83	21.00	1.00	21.00
##FFFFFF	5.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2270CF

Deuteranopia (green-blind)

#0063C9

Tritanopia (blue-blind)

#007C8D

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #3b63cb;
/* rgb */ color: rgb(59, 99, 203);
/* oklch */ color: oklch(52.9% 0.168 265.2);

Tailwind

colors: {
  custom: {
    50: '#838edb',
    500: '#3b63cb',
    950: '#000000',
  },
}

SCSS

$custom: #3b63cb;
$custom-light: #838edb;
$custom-dark: #000000;

JSON

{
  "hex": "#3b63cb",
  "rgb": {
    "r": 59,
    "g": 99,
    "b": 203
  },
  "hsl": {
    "h": 223.333,
    "s": 58.065,
    "l": 51.373
  },
  "oklch": {
    "l": 0.52885,
    "c": 0.16779,
    "h": 265.2
  },
  "luminance": 0.14165
}

Semantic roles & 50–950 ramp

primary

#3B63CB

secondary

#D1BF91

accent

#B647E1

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3B63CB

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

Preview Lab → · Contrast checker → · Palette generator →