#373FAC#373FAC

#373FAC is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.2% C 0.171 H 273.5°. Best body text is #FFFFFF at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#373FAC
RGB	rgb(55, 63, 172)
HSL	hsl(236, 52%, 45%)
HSV	hsv(236, 68%, 67%)
CMYK	cmyk(68%, 63.4%, 0%, 32.5%)
CIE-LAB	lab(32.58, 32.76, -59.33)
CIE-LCH	lch(32.58, 67.77, 298.91°)
OKLab	oklab(43.2% 0.0105 -0.1711)
OKLCH	oklch(43.2% 0.171 273.5)
XYZ	xyz(10.7970, 7.3448, 39.8704)
Luminance	0.0735 (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

#373FAC #ACA437

analogous

#377AAC #373FAC #6937AC

triadic

#373FAC #AC373F #3FAC37

tetradic

#373FAC #AC377A #ACA437 #37AC69

square

#373FAC #AC377A #ACA437 #37AC69

split-complementary

#373FAC #AC6937 #7AAC37

monochromatic

#191D4F #282E7E #373FAC #575FC9 #858BD8

Accessibility & contrast

On white

8.50

#373FAC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#373FAC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FAC

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FAC	#FFFFFF	#000000	##FFFFFF
##373FAC	1.00	8.50	2.47	8.50
#FFFFFF	8.50	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B0

Deuteranopia (green-blind)

#0047AA

Tritanopia (blue-blind)

#005B6F

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #373fac;
/* rgb */ color: rgb(55, 63, 172);
/* oklch */ color: oklch(43.2% 0.171 273.5);

Tailwind

colors: {
  custom: {
    50: '#7d74c6',
    500: '#373fac',
    950: '#000000',
  },
}

SCSS

$custom: #373fac;
$custom-light: #7d74c6;
$custom-dark: #000000;

JSON

{
  "hex": "#373fac",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 172
  },
  "hsl": {
    "h": 235.897,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.43199,
    "c": 0.17147,
    "h": 273.5
  },
  "luminance": 0.07346
}

Semantic roles & 50–950 ramp

primary

#373FAC

secondary

#C2BD7D

accent

#D14DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373FAC

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

Preview Lab → · Contrast checker → · Palette generator →