#3F41CB#3F41CB

#3F41CB is a mid, highly saturated blue. Relative luminance 0.091; OKLCH L 46.9% C 0.207 H 274.3°. Best body text is #FFFFFF at 7.42:1 contrast (WCAG AA passes).

Color values

HEX	#3F41CB
RGB	rgb(63, 65, 203)
HSL	hsl(239, 57%, 52%)
HSV	hsv(239, 69%, 80%)
CMYK	cmyk(69%, 68%, 0%, 20.4%)
CIE-LAB	lab(36.27, 43.20, -71.52)
CIE-LCH	lch(36.27, 83.55, 301.13°)
OKLab	oklab(46.85% 0.0156 -0.2067)
OKLCH	oklch(46.85% 0.207 274.3)
XYZ	xyz(14.7161, 9.1478, 57.4785)
Luminance	0.0915 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue Blue

#2242C7

ΔE00 2.91

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F41CB #CBC93F

analogous

#3F87CB #3F41CB #833FCB

triadic

#3F41CB #CB3F41 #41CB3F

tetradic

#3F41CB #CB3F87 #CBC93F #3FCB83

square

#3F41CB #CB3F87 #CBC93F #3FCB83

split-complementary

#3F41CB #CB833F #87CB3F

monochromatic

#1F2071 #2C2DA1 #3F41CB #6F71D8 #9FA0E5

Accessibility & contrast

On white

7.42

#3F41CB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.83

#3F41CB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F41CB

7.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F41CB	#FFFFFF	#000000	##FFFFFF
##3F41CB	1.00	7.42	2.83	7.42
#FFFFFF	7.42	1.00	21.00	1.00
#000000	2.83	21.00	1.00	21.00
##FFFFFF	7.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CCF

Deuteranopia (green-blind)

#004FC8

Tritanopia (blue-blind)

#006681

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3f41cb;
/* rgb */ color: rgb(63, 65, 203);
/* oklch */ color: oklch(46.9% 0.207 274.3);

Tailwind

colors: {
  custom: {
    50: '#8776dc',
    500: '#3f41cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f41cb;
$custom-light: #8776dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f41cb",
  "rgb": {
    "r": 63,
    "g": 65,
    "b": 203
  },
  "hsl": {
    "h": 239.143,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.46853,
    "c": 0.20724,
    "h": 274.3
  },
  "luminance": 0.09149
}

Semantic roles & 50–950 ramp

primary

#3F41CB

secondary

#D1D194

accent

#DE47E1

background

#F9F7FD

surface

#F1EDFB

border

#CBC8D4

text

#0D0815

muted

#7E7B83

Preview Lab

Preview with #3F41CB

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

Preview Lab → · Contrast checker → · Palette generator →