#3F41C5#3F41C5

#3F41C5 is a mid, vivid blue. Relative luminance 0.089; OKLCH L 46.3% C 0.200 H 274.7°. Best body text is #FFFFFF at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#3F41C5
RGB	rgb(63, 65, 197)
HSL	hsl(239, 54%, 51%)
HSV	hsv(239, 68%, 77%)
CMYK	cmyk(68%, 67%, 0%, 22.7%)
CIE-LAB	lab(35.73, 41.19, -68.91)
CIE-LCH	lch(35.73, 80.29, 300.87°)
OKLab	oklab(46.3% 0.0163 -0.199)
OKLCH	oklch(46.3% 0.2 274.7)
XYZ	xyz(14.0149, 8.8673, 53.7855)
Luminance	0.0887 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F41C5 #C5C33F

analogous

#3F84C5 #3F41C5 #803FC5

triadic

#3F41C5 #C53F41 #41C53F

tetradic

#3F41C5 #C53F84 #C5C33F #3FC580

square

#3F41C5 #C53F84 #C5C33F #3FC580

split-complementary

#3F41C5 #C5803F #84C53F

monochromatic

#20216A #2E3099 #3F41C5 #6E70D3 #9D9EE1

Accessibility & contrast

On white

7.57

#3F41C5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#3F41C5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F41C5

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F41C5	#FFFFFF	#000000	##FFFFFF
##3F41C5	1.00	7.57	2.77	7.57
#FFFFFF	7.57	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AC9

Deuteranopia (green-blind)

#004EC3

Tritanopia (blue-blind)

#00647D

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3f41c5;
/* rgb */ color: rgb(63, 65, 197);
/* oklch */ color: oklch(46.3% 0.200 274.7);

Tailwind

colors: {
  custom: {
    50: '#8576d8',
    500: '#3f41c5',
    950: '#000000',
  },
}

SCSS

$custom: #3f41c5;
$custom-light: #8576d8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f41c5",
  "rgb": {
    "r": 63,
    "g": 65,
    "b": 197
  },
  "hsl": {
    "h": 239.104,
    "s": 53.6,
    "l": 50.98
  },
  "oklch": {
    "l": 0.46298,
    "c": 0.19969,
    "h": 274.7
  },
  "luminance": 0.08869
}

Semantic roles & 50–950 ramp

primary

#3F41C5

secondary

#CECD92

accent

#DB4BDD

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0D0815

muted

#7D7B83

Preview Lab

Preview with #3F41C5

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

Preview Lab → · Contrast checker → · Palette generator →