#3F41B4#3F41B4

#3F41B4 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.8% C 0.178 H 275.7°. Best body text is #FFFFFF at 8.00:1 contrast (WCAG AA passes).

Color values

HEX	#3F41B4
RGB	rgb(63, 65, 180)
HSL	hsl(239, 48%, 48%)
HSV	hsv(239, 65%, 71%)
CMYK	cmyk(65%, 63.9%, 0%, 29.4%)
CIE-LAB	lab(34.26, 35.43, -61.33)
CIE-LCH	lch(34.26, 70.83, 300.02°)
OKLab	oklab(44.77% 0.0178 -0.1768)
OKLCH	oklch(44.77% 0.178 275.7)
XYZ	xyz(12.1757, 8.1316, 44.0991)
Luminance	0.0813 (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

#3F41B4 #B4B23F

analogous

#3F7CB4 #3F41B4 #773FB4

triadic

#3F41B4 #B43F41 #41B43F

tetradic

#3F41B4 #B43F7C #B4B23F #3FB477

square

#3F41B4 #B43F7C #B4B23F #3FB477

split-complementary

#3F41B4 #B4773F #7CB43F

monochromatic

#1F2059 #2F3187 #3F41B4 #6768CA #9495DA

Accessibility & contrast

On white

8.00

#3F41B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#3F41B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F41B4

8.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F41B4	#FFFFFF	#000000	##FFFFFF
##3F41B4	1.00	8.00	2.63	8.00
#FFFFFF	8.00	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	8.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056B8

Deuteranopia (green-blind)

#004BB2

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3f41b4;
/* rgb */ color: rgb(63, 65, 180);
/* oklch */ color: oklch(44.8% 0.178 275.7);

Tailwind

colors: {
  custom: {
    50: '#8276cb',
    500: '#3f41b4',
    950: '#000000',
  },
}

SCSS

$custom: #3f41b4;
$custom-light: #8276cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f41b4",
  "rgb": {
    "r": 63,
    "g": 65,
    "b": 180
  },
  "hsl": {
    "h": 238.974,
    "s": 48.148,
    "l": 47.647
  },
  "oklch": {
    "l": 0.44773,
    "c": 0.17768,
    "h": 275.7
  },
  "luminance": 0.08133
}

Semantic roles & 50–950 ramp

primary

#3F41B4

secondary

#C5C48A

accent

#D550D8

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #3F41B4

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

Preview Lab → · Contrast checker → · Palette generator →