#3F53C7#3F53C7

#3F53C7 is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.6% C 0.181 H 270.9°. Best body text is #FFFFFF at 6.42:1 contrast (WCAG AA passes).

Color values

HEX	#3F53C7
RGB	rgb(63, 83, 199)
HSL	hsl(231, 55%, 51%)
HSV	hsv(231, 68%, 78%)
CMYK	cmyk(68.3%, 58.3%, 0%, 22%)
CIE-LAB	lab(40.19, 30.67, -62.79)
CIE-LCH	lch(40.19, 69.88, 296.04°)
OKLab	oklab(49.63% 0.0027 -0.1809)
OKLCH	oklch(49.63% 0.181 270.9)
XYZ	xyz(15.4485, 11.3653, 55.4013)
Luminance	0.1137 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F53C7 #C7B33F

analogous

#3F97C7 #3F53C7 #6F3FC7

triadic

#3F53C7 #C73F53 #53C73F

tetradic

#3F53C7 #C73F97 #C7B33F #3FC76F

square

#3F53C7 #C73F97 #C7B33F #3FC76F

split-complementary

#3F53C7 #C76F3F #97C73F

monochromatic

#202B6C #2D3E9B #3F53C7 #6E7DD5 #9EA8E3

Accessibility & contrast

On white

6.42

#3F53C7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#3F53C7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F53C7

6.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F53C7	#FFFFFF	#000000	##FFFFFF
##3F53C7	1.00	6.42	3.27	6.42
#FFFFFF	6.42	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065CB

Deuteranopia (green-blind)

#0059C5

Tritanopia (blue-blind)

#007085

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3f53c7;
/* rgb */ color: rgb(63, 83, 199);
/* oklch */ color: oklch(49.6% 0.181 270.9);

Tailwind

colors: {
  custom: {
    50: '#8483d9',
    500: '#3f53c7',
    950: '#000000',
  },
}

SCSS

$custom: #3f53c7;
$custom-light: #8483d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f53c7",
  "rgb": {
    "r": 63,
    "g": 83,
    "b": 199
  },
  "hsl": {
    "h": 231.176,
    "s": 54.839,
    "l": 51.373
  },
  "oklch": {
    "l": 0.49628,
    "c": 0.18095,
    "h": 270.9
  },
  "luminance": 0.11367
}

Semantic roles & 50–950 ramp

primary

#3F53C7

secondary

#CFC693

accent

#C84ADE

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3F53C7

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

Preview Lab → · Contrast checker → · Palette generator →