#373AA5#373AA5

#373AA5 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.7% C 0.168 H 275.1°. Best body text is #FFFFFF at 9.09:1 contrast (WCAG AA passes).

Color values

HEX	#373AA5
RGB	rgb(55, 58, 165)
HSL	hsl(238, 50%, 43%)
HSV	hsv(238, 67%, 65%)
CMYK	cmyk(66.7%, 64.8%, 0%, 35.3%)
CIE-LAB	lab(30.77, 33.49, -58.09)
CIE-LCH	lch(30.77, 67.05, 299.96°)
OKLab	oklab(41.69% 0.0149 -0.1675)
OKLCH	oklch(41.69% 0.168 275.1)
XYZ	xyz(9.8779, 6.5541, 36.3345)
Luminance	0.0655 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.24

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373AA5 #A5A237

analogous

#3771A5 #373AA5 #6B37A5

triadic

#373AA5 #A5373A #3AA537

tetradic

#373AA5 #A53771 #A5A237 #37A56B

square

#373AA5 #A53771 #A5A237 #37A56B

split-complementary

#373AA5 #A56B37 #71A537

monochromatic

#181A49 #282A77 #373AA5 #5357C6 #8184D5

Accessibility & contrast

On white

9.09

#373AA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#373AA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373AA5

9.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373AA5	#FFFFFF	#000000	##FFFFFF
##373AA5	1.00	9.09	2.31	9.09
#FFFFFF	9.09	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA8

Deuteranopia (green-blind)

#0044A3

Tritanopia (blue-blind)

#00556A

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #373aa5;
/* rgb */ color: rgb(55, 58, 165);
/* oklch */ color: oklch(41.7% 0.168 275.1);

Tailwind

colors: {
  custom: {
    50: '#7c70c1',
    500: '#373aa5',
    950: '#000000',
  },
}

SCSS

$custom: #373aa5;
$custom-light: #7c70c1;
$custom-dark: #000000;

JSON

{
  "hex": "#373aa5",
  "rgb": {
    "r": 55,
    "g": 58,
    "b": 165
  },
  "hsl": {
    "h": 238.364,
    "s": 50,
    "l": 43.137
  },
  "oklch": {
    "l": 0.41687,
    "c": 0.1682,
    "h": 275.1
  },
  "luminance": 0.06555
}

Semantic roles & 50–950 ramp

primary

#373AA5

secondary

#BFBD79

accent

#D64EDA

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #373AA5

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

Preview Lab → · Contrast checker → · Palette generator →