#373A99#373A99

#373A99 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.6% C 0.152 H 275.9°. Best body text is #FFFFFF at 9.43:1 contrast (WCAG AA passes).

Color values

HEX	#373A99
RGB	rgb(55, 58, 153)
HSL	hsl(238, 47%, 41%)
HSV	hsv(238, 64%, 60%)
CMYK	cmyk(64.1%, 62.1%, 0%, 40%)
CIE-LAB	lab(29.76, 29.28, -52.47)
CIE-LCH	lch(29.76, 60.09, 299.16°)
OKLab	oklab(40.63% 0.0156 -0.151)
OKLCH	oklch(40.63% 0.152 275.9)
XYZ	xyz(8.8365, 6.1375, 30.8498)
Luminance	0.0614 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373A99 #999637

analogous

#376B99 #373A99 #653799

triadic

#373A99 #99373A #3A9937

tetradic

#373A99 #99376B #999637 #379965

square

#373A99 #99376B #999637 #379965

split-complementary

#373A99 #996537 #6B9937

monochromatic

#17183F #27296C #373A99 #4E51BF #7B7DD0

Accessibility & contrast

On white

9.43

#373A99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#373A99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373A99

9.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373A99	#FFFFFF	#000000	##FFFFFF
##373A99	1.00	9.43	2.23	9.43
#FFFFFF	9.43	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9C

Deuteranopia (green-blind)

#004297

Tritanopia (blue-blind)

#005264

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #373a99;
/* rgb */ color: rgb(55, 58, 153);
/* oklch */ color: oklch(40.6% 0.152 275.9);

Tailwind

colors: {
  custom: {
    50: '#7970b8',
    500: '#373a99',
    950: '#000000',
  },
}

SCSS

$custom: #373a99;
$custom-light: #7970b8;
$custom-dark: #000000;

JSON

{
  "hex": "#373a99",
  "rgb": {
    "r": 55,
    "g": 58,
    "b": 153
  },
  "hsl": {
    "h": 238.163,
    "s": 47.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.4063,
    "c": 0.15186,
    "h": 275.9
  },
  "luminance": 0.06138
}

Semantic roles & 50–950 ramp

primary

#373A99

secondary

#B9B673

accent

#D351D7

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0711

muted

#7C7A80

Preview Lab

Preview with #373A99

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

Preview Lab → · Contrast checker → · Palette generator →