#373399#373399

#373399 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.4% C 0.161 H 277.8°. Best body text is #FFFFFF at 10.02:1 contrast (WCAG AA passes).

Color values

HEX	#373399
RGB	rgb(55, 51, 153)
HSL	hsl(242, 50%, 40%)
HSV	hsv(242, 67%, 60%)
CMYK	cmyk(64.1%, 66.7%, 0%, 40%)
CIE-LAB	lab(28.06, 33.75, -55.24)
CIE-LCH	lch(28.06, 64.74, 301.43°)
OKLab	oklab(39.39% 0.0218 -0.1592)
OKLCH	oklch(39.39% 0.161 277.8)
XYZ	xyz(8.5073, 5.4791, 30.7401)
Luminance	0.0548 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373399 #959933

analogous

#336299 #373399 #6A3399

triadic

#373399 #993733 #339937

tetradic

#373399 #993362 #959933 #33996A

square

#373399 #993362 #959933 #33996A

split-complementary

#373399 #996A33 #629933

monochromatic

#16143D #27246B #373399 #4C47C2 #7975D1

Accessibility & contrast

On white

10.02

#373399 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#373399 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373399

10.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373399	#FFFFFF	#000000	##FFFFFF
##373399	1.00	10.02	2.10	10.02
#FFFFFF	10.02	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00469C

Deuteranopia (green-blind)

#003E97

Tritanopia (blue-blind)

#004D61

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #373399;
/* rgb */ color: rgb(55, 51, 153);
/* oklch */ color: oklch(39.4% 0.161 277.8);

Tailwind

colors: {
  custom: {
    50: '#7a6bb8',
    500: '#373399',
    950: '#000000',
  },
}

SCSS

$custom: #373399;
$custom-light: #7a6bb8;
$custom-dark: #000000;

JSON

{
  "hex": "#373399",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 153
  },
  "hsl": {
    "h": 242.353,
    "s": 50,
    "l": 40
  },
  "oklch": {
    "l": 0.39387,
    "c": 0.1607,
    "h": 277.8
  },
  "luminance": 0.0548
}

Semantic roles & 50–950 ramp

primary

#373399

secondary

#B6B96E

accent

#DA4ED4

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#0A0711

muted

#7C7A80

Preview Lab

Preview with #373399

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

Preview Lab → · Contrast checker → · Palette generator →