#373BB9#373BB9

#373BB9 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.7% C 0.193 H 273.6°. Best body text is #FFFFFF at 8.44:1 contrast (WCAG AA passes).

Color values

HEX	#373BB9
RGB	rgb(55, 59, 185)
HSL	hsl(238, 54%, 47%)
HSV	hsv(238, 70%, 73%)
CMYK	cmyk(70.3%, 68.1%, 0%, 27.5%)
CIE-LAB	lab(32.79, 39.78, -66.70)
CIE-LCH	lch(32.79, 77.66, 300.81°)
OKLab	oklab(43.71% 0.0123 -0.1928)
OKLCH	oklch(43.71% 0.193 273.6)
XYZ	xyz(11.8935, 7.4418, 46.6991)
Luminance	0.0744 (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

#373BB9 #B9B537

analogous

#377CB9 #373BB9 #7437B9

triadic

#373BB9 #B9373B #3BB937

tetradic

#373BB9 #B9377C #B9B537 #37B974

square

#373BB9 #B9377C #B9B537 #37B974

split-complementary

#373BB9 #B97437 #7CB937

monochromatic

#1B1D5B #292C8A #373BB9 #5E62CF #8D90DD

Accessibility & contrast

On white

8.44

#373BB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#373BB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373BB9

8.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373BB9	#FFFFFF	#000000	##FFFFFF
##373BB9	1.00	8.44	2.49	8.44
#FFFFFF	8.44	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053BD

Deuteranopia (green-blind)

#0047B7

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #373bb9;
/* rgb */ color: rgb(55, 59, 185);
/* oklch */ color: oklch(43.7% 0.193 273.6);

Tailwind

colors: {
  custom: {
    50: '#8071cf',
    500: '#373bb9',
    950: '#000000',
  },
}

SCSS

$custom: #373bb9;
$custom-light: #8071cf;
$custom-dark: #000000;

JSON

{
  "hex": "#373bb9",
  "rgb": {
    "r": 55,
    "g": 59,
    "b": 185
  },
  "hsl": {
    "h": 238.154,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.43708,
    "c": 0.19316,
    "h": 273.6
  },
  "luminance": 0.07443
}

Semantic roles & 50–950 ramp

primary

#373BB9

secondary

#C8C684

accent

#D94ADE

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #373BB9

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

Preview Lab → · Contrast checker → · Palette generator →