#3F41BE#3F41BE

#3F41BE is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.7% C 0.191 H 275.1°. Best body text is #FFFFFF at 7.75:1 contrast (WCAG AA passes).

Color values

HEX	#3F41BE
RGB	rgb(63, 65, 190)
HSL	hsl(239, 50%, 50%)
HSV	hsv(239, 67%, 75%)
CMYK	cmyk(66.8%, 65.8%, 0%, 25.5%)
CIE-LAB	lab(35.11, 38.83, -65.83)
CIE-LCH	lch(35.11, 76.43, 300.54°)
OKLab	oklab(45.66% 0.017 -0.19)
OKLCH	oklch(45.66% 0.191 275.1)
XYZ	xyz(13.2314, 8.5539, 49.6590)
Luminance	0.0856 (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

#3F41BE #BEBC3F

analogous

#3F81BE #3F41BE #7D3FBE

triadic

#3F41BE #BE3F41 #41BE3F

tetradic

#3F41BE #BE3F81 #BEBC3F #3FBE7D

square

#3F41BE #BE3F81 #BEBC3F #3FBE7D

split-complementary

#3F41BE #BE7D3F #81BE3F

monochromatic

#212262 #303190 #3F41BE #6C6ECE #9A9BDD

Accessibility & contrast

On white

7.75

#3F41BE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#3F41BE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F41BE

7.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F41BE	#FFFFFF	#000000	##FFFFFF
##3F41BE	1.00	7.75	2.71	7.75
#FFFFFF	7.75	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058C2

Deuteranopia (green-blind)

#004DBC

Tritanopia (blue-blind)

#00627A

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3f41be;
/* rgb */ color: rgb(63, 65, 190);
/* oklch */ color: oklch(45.7% 0.191 275.1);

Tailwind

colors: {
  custom: {
    50: '#8476d3',
    500: '#3f41be',
    950: '#000000',
  },
}

SCSS

$custom: #3f41be;
$custom-light: #8476d3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f41be",
  "rgb": {
    "r": 63,
    "g": 65,
    "b": 190
  },
  "hsl": {
    "h": 239.055,
    "s": 50.198,
    "l": 49.608
  },
  "oklch": {
    "l": 0.45661,
    "c": 0.19074,
    "h": 275.1
  },
  "luminance": 0.08555
}

Semantic roles & 50–950 ramp

primary

#3F41BE

secondary

#C9C98F

accent

#D84EDA

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3F41BE

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

Preview Lab → · Contrast checker → · Palette generator →