#3F41BF#3F41BF

#3F41BF is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.8% C 0.192 H 275.0°. Best body text is #FFFFFF at 7.72:1 contrast (WCAG AA passes).

Color values

HEX	#3F41BF
RGB	rgb(63, 65, 191)
HSL	hsl(239, 50%, 50%)
HSV	hsv(239, 67%, 75%)
CMYK	cmyk(67%, 66%, 0%, 25.1%)
CIE-LAB	lab(35.20, 39.17, -66.27)
CIE-LCH	lch(35.20, 76.98, 300.58°)
OKLab	oklab(45.75% 0.0169 -0.1913)
OKLCH	oklch(45.75% 0.192 275)
XYZ	xyz(13.3411, 8.5978, 50.2366)
Luminance	0.0860 (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

#3F41BF #BFBD3F

analogous

#3F81BF #3F41BF #7D3FBF

triadic

#3F41BF #BF3F41 #41BF3F

tetradic

#3F41BF #BF3F81 #BFBD3F #3FBF7D

square

#3F41BF #BF3F81 #BFBD3F #3FBF7D

split-complementary

#3F41BF #BF7D3F #81BF3F

monochromatic

#212263 #303191 #3F41BF #6D6ECF #9B9CDE

Accessibility & contrast

On white

7.72

#3F41BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#3F41BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F41BF

7.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F41BF	#FFFFFF	#000000	##FFFFFF
##3F41BF	1.00	7.72	2.72	7.72
#FFFFFF	7.72	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059C3

Deuteranopia (green-blind)

#004DBD

Tritanopia (blue-blind)

#00627A

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3f41bf;
/* rgb */ color: rgb(63, 65, 191);
/* oklch */ color: oklch(45.8% 0.192 275.0);

Tailwind

colors: {
  custom: {
    50: '#8476d3',
    500: '#3f41bf',
    950: '#000000',
  },
}

SCSS

$custom: #3f41bf;
$custom-light: #8476d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f41bf",
  "rgb": {
    "r": 63,
    "g": 65,
    "b": 191
  },
  "hsl": {
    "h": 239.063,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.45751,
    "c": 0.19203,
    "h": 275
  },
  "luminance": 0.08599
}

Semantic roles & 50–950 ramp

primary

#3F41BF

secondary

#CAC990

accent

#D84EDA

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3F41BF

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

Preview Lab → · Contrast checker → · Palette generator →