#373DA8#373DA8

#373DA8 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.5% C 0.169 H 274.2°. Best body text is #FFFFFF at 8.77:1 contrast (WCAG AA passes).

Color values

HEX	#373DA8
RGB	rgb(55, 61, 168)
HSL	hsl(237, 51%, 44%)
HSV	hsv(237, 67%, 66%)
CMYK	cmyk(67.3%, 63.7%, 0%, 34.1%)
CIE-LAB	lab(31.75, 32.63, -58.28)
CIE-LCH	lch(31.75, 66.80, 299.24°)
OKLab	oklab(42.49% 0.0123 -0.1681)
OKLCH	oklch(42.49% 0.169 274.2)
XYZ	xyz(10.3098, 6.9759, 37.8414)
Luminance	0.0698 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.03

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373DA8 #A8A237

analogous

#3775A8 #373DA8 #6937A8

triadic

#373DA8 #A8373D #3DA837

tetradic

#373DA8 #A83775 #A8A237 #37A869

square

#373DA8 #A83775 #A8A237 #37A869

split-complementary

#373DA8 #A86937 #75A837

monochromatic

#191C4C #282C7A #373DA8 #555BC7 #8387D6

Accessibility & contrast

On white

8.77

#373DA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#373DA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DA8

8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DA8	#FFFFFF	#000000	##FFFFFF
##373DA8	1.00	8.77	2.40	8.77
#FFFFFF	8.77	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AB

Deuteranopia (green-blind)

#0046A6

Tritanopia (blue-blind)

#00586D

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #373da8;
/* rgb */ color: rgb(55, 61, 168);
/* oklch */ color: oklch(42.5% 0.169 274.2);

Tailwind

colors: {
  custom: {
    50: '#7c72c3',
    500: '#373da8',
    950: '#000000',
  },
}

SCSS

$custom: #373da8;
$custom-light: #7c72c3;
$custom-dark: #000000;

JSON

{
  "hex": "#373da8",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 168
  },
  "hsl": {
    "h": 236.814,
    "s": 50.673,
    "l": 43.725
  },
  "oklch": {
    "l": 0.42487,
    "c": 0.16855,
    "h": 274.2
  },
  "luminance": 0.06977
}

Semantic roles & 50–950 ramp

primary

#373DA8

secondary

#C0BC7B

accent

#D34EDA

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373DA8

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

Preview Lab → · Contrast checker → · Palette generator →