#373DAC#373DAC

#373DAC is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.8% C 0.174 H 274.0°. Best body text is #FFFFFF at 8.66:1 contrast (WCAG AA passes).

Color values

HEX	#373DAC
RGB	rgb(55, 61, 172)
HSL	hsl(237, 52%, 45%)
HSV	hsv(237, 68%, 67%)
CMYK	cmyk(68%, 64.5%, 0%, 32.5%)
CIE-LAB	lab(32.09, 34.03, -60.12)
CIE-LCH	lch(32.09, 69.08, 299.51°)
OKLab	oklab(42.84% 0.0121 -0.1735)
OKLCH	oklch(42.84% 0.174 274)
XYZ	xyz(10.6882, 7.1273, 39.8342)
Luminance	0.0713 (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

#373DAC #ACA637

analogous

#3778AC #373DAC #6C37AC

triadic

#373DAC #AC373D #3DAC37

tetradic

#373DAC #AC3778 #ACA637 #37AC6C

square

#373DAC #AC3778 #ACA637 #37AC6C

split-complementary

#373DAC #AC6C37 #78AC37

monochromatic

#191C4F #282D7E #373DAC #575DC9 #858AD8

Accessibility & contrast

On white

8.66

#373DAC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#373DAC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DAC

8.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DAC	#FFFFFF	#000000	##FFFFFF
##373DAC	1.00	8.66	2.43	8.66
#FFFFFF	8.66	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B0

Deuteranopia (green-blind)

#0046AA

Tritanopia (blue-blind)

#005A6F

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #373dac;
/* rgb */ color: rgb(55, 61, 172);
/* oklch */ color: oklch(42.8% 0.174 274.0);

Tailwind

colors: {
  custom: {
    50: '#7d73c6',
    500: '#373dac',
    950: '#000000',
  },
}

SCSS

$custom: #373dac;
$custom-light: #7d73c6;
$custom-dark: #000000;

JSON

{
  "hex": "#373dac",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 172
  },
  "hsl": {
    "h": 236.923,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.42844,
    "c": 0.1739,
    "h": 274
  },
  "luminance": 0.07128
}

Semantic roles & 50–950 ramp

primary

#373DAC

secondary

#C2BE7D

accent

#D44DDB

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373DAC

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

Preview Lab → · Contrast checker → · Palette generator →