#373AB0#373AB0

#373AB0 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.7% C 0.183 H 274.4°. Best body text is #FFFFFF at 8.77:1 contrast (WCAG AA passes).

Color values

HEX	#373AB0
RGB	rgb(55, 58, 176)
HSL	hsl(239, 52%, 45%)
HSV	hsv(239, 69%, 69%)
CMYK	cmyk(68.8%, 67%, 0%, 31%)
CIE-LAB	lab(31.74, 37.30, -63.08)
CIE-LCH	lch(31.74, 73.29, 300.60°)
OKLab	oklab(42.7% 0.0139 -0.1822)
OKLCH	oklch(42.7% 0.183 274.4)
XYZ	xyz(10.9225, 6.9719, 41.8360)
Luminance	0.0697 (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

#373AB0 #B0AD37

analogous

#3777B0 #373AB0 #7037B0

triadic

#373AB0 #B0373A #3AB037

tetradic

#373AB0 #B03777 #B0AD37 #37B070

square

#373AB0 #B03777 #B0AD37 #37B070

split-complementary

#373AB0 #B07037 #77B037

monochromatic

#1A1B53 #282B81 #373AB0 #595CCB #888ADA

Accessibility & contrast

On white

8.77

#373AB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#373AB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373AB0

8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373AB0	#FFFFFF	#000000	##FFFFFF
##373AB0	1.00	8.77	2.39	8.77
#FFFFFF	8.77	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B4

Deuteranopia (green-blind)

#0045AE

Tritanopia (blue-blind)

#005970

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #373ab0;
/* rgb */ color: rgb(55, 58, 176);
/* oklch */ color: oklch(42.7% 0.183 274.4);

Tailwind

colors: {
  custom: {
    50: '#7e71c9',
    500: '#373ab0',
    950: '#000000',
  },
}

SCSS

$custom: #373ab0;
$custom-light: #7e71c9;
$custom-dark: #000000;

JSON

{
  "hex": "#373ab0",
  "rgb": {
    "r": 55,
    "g": 58,
    "b": 176
  },
  "hsl": {
    "h": 238.512,
    "s": 52.381,
    "l": 45.294
  },
  "oklch": {
    "l": 0.42696,
    "c": 0.18271,
    "h": 274.4
  },
  "luminance": 0.06973
}

Semantic roles & 50–950 ramp

primary

#373AB0

secondary

#C4C27F

accent

#D84CDC

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #373AB0

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

Preview Lab → · Contrast checker → · Palette generator →