#371FB4#371FB4

#371FB4 is a dark, highly saturated blue. Relative luminance 0.051; OKLCH L 39.4% C 0.214 H 277.5°. Best body text is #FFFFFF at 10.41:1 contrast (WCAG AA passes).

Color values

HEX	#371FB4
RGB	rgb(55, 31, 180)
HSL	hsl(250, 71%, 41%)
HSV	hsv(250, 83%, 71%)
CMYK	cmyk(69.4%, 82.8%, 0%, 29.4%)
CIE-LAB	lab(26.98, 53.13, -73.32)
CIE-LCH	lch(26.98, 90.55, 305.93°)
OKLab	oklab(39.44% 0.0279 -0.2118)
OKLCH	oklch(39.44% 0.214 277.5)
XYZ	xyz(10.3011, 5.0866, 43.6101)
Luminance	0.0509 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#371FB4 #9CB41F

analogous

#1F52B4 #371FB4 #821FB4

triadic

#371FB4 #B4371F #1FB437

tetradic

#371FB4 #B41F52 #9CB41F #1FB482

square

#371FB4 #B41F52 #9CB41F #1FB482

split-complementary

#371FB4 #B4821F #52B41F

monochromatic

#170D4C #271680 #371FB4 #4F34DC #7C68E5

Accessibility & contrast

On white

10.41

#371FB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#371FB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #371FB4

10.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##371FB4	#FFFFFF	#000000	##FFFFFF
##371FB4	1.00	10.41	2.02	10.41
#FFFFFF	10.41	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046B8

Deuteranopia (green-blind)

#0039B1

Tritanopia (blue-blind)

#004E6B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #371fb4;
/* rgb */ color: rgb(55, 31, 180);
/* oklch */ color: oklch(39.4% 0.214 277.5);

Tailwind

colors: {
  custom: {
    50: '#8161cc',
    500: '#371fb4',
    950: '#000000',
  },
}

SCSS

$custom: #371fb4;
$custom-light: #8161cc;
$custom-dark: #000000;

JSON

{
  "hex": "#371fb4",
  "rgb": {
    "r": 55,
    "g": 31,
    "b": 180
  },
  "hsl": {
    "h": 249.664,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.39444,
    "c": 0.21366,
    "h": 277.5
  },
  "luminance": 0.05087
}

Semantic roles & 50–950 ramp

primary

#371FB4

secondary

#BACB64

accent

#ED3AD1

background

#F8F5FC

surface

#F0EAF9

border

#CBC6D2

text

#0C0514

muted

#7D7982

Preview Lab

Preview with #371FB4

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

Preview Lab → · Contrast checker → · Palette generator →