#373BB7#373BB7

#373BB7 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.5% C 0.191 H 273.8°. Best body text is #FFFFFF at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#373BB7
RGB	rgb(55, 59, 183)
HSL	hsl(238, 54%, 47%)
HSV	hsv(238, 70%, 72%)
CMYK	cmyk(69.9%, 67.8%, 0%, 28.2%)
CIE-LAB	lab(32.61, 39.09, -65.82)
CIE-LCH	lch(32.61, 76.56, 300.71°)
OKLab	oklab(43.52% 0.0125 -0.1902)
OKLCH	oklch(43.52% 0.191 273.8)
XYZ	xyz(11.6839, 7.3579, 45.5950)
Luminance	0.0736 (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

#373BB7 #B7B337

analogous

#377BB7 #373BB7 #7337B7

triadic

#373BB7 #B7373B #3BB737

tetradic

#373BB7 #B7377B #B7B337 #37B773

square

#373BB7 #B7377B #B7B337 #37B773

split-complementary

#373BB7 #B77337 #7BB737

monochromatic

#1B1D59 #292C88 #373BB7 #5D60CE #8C8EDC

Accessibility & contrast

On white

8.50

#373BB7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#373BB7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373BB7

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373BB7	#FFFFFF	#000000	##FFFFFF
##373BB7	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)

#0053BB

Deuteranopia (green-blind)

#0047B5

Tritanopia (blue-blind)

#005C74

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #373bb7;
/* rgb */ color: rgb(55, 59, 183);
/* oklch */ color: oklch(43.5% 0.191 273.8);

Tailwind

colors: {
  custom: {
    50: '#7f71ce',
    500: '#373bb7',
    950: '#000000',
  },
}

SCSS

$custom: #373bb7;
$custom-light: #7f71ce;
$custom-dark: #000000;

JSON

{
  "hex": "#373bb7",
  "rgb": {
    "r": 55,
    "g": 59,
    "b": 183
  },
  "hsl": {
    "h": 238.125,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.43518,
    "c": 0.1906,
    "h": 273.8
  },
  "luminance": 0.07359
}

Semantic roles & 50–950 ramp

primary

#373BB7

secondary

#C7C583

accent

#D94BDD

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #373BB7

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

Preview Lab → · Contrast checker → · Palette generator →