#373DA5#373DA5

#373DA5 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.2% C 0.165 H 274.4°. Best body text is #FFFFFF at 8.85:1 contrast (WCAG AA passes).

Color values

HEX	#373DA5
RGB	rgb(55, 61, 165)
HSL	hsl(237, 50%, 43%)
HSV	hsv(237, 67%, 65%)
CMYK	cmyk(66.7%, 63%, 0%, 35.3%)
CIE-LAB	lab(31.50, 31.57, -56.90)
CIE-LCH	lch(31.50, 65.07, 299.03°)
OKLab	oklab(42.22% 0.0125 -0.164)
OKLCH	oklch(42.22% 0.165 274.4)
XYZ	xyz(10.0336, 6.8654, 36.3864)
Luminance	0.0687 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373DA5 #A59F37

analogous

#3774A5 #373DA5 #6837A5

triadic

#373DA5 #A5373D #3DA537

tetradic

#373DA5 #A53774 #A59F37 #37A568

square

#373DA5 #A53774 #A59F37 #37A568

split-complementary

#373DA5 #A56837 #74A537

monochromatic

#181B49 #282C77 #373DA5 #535AC6 #8186D5

Accessibility & contrast

On white

8.85

#373DA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#373DA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DA5

8.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DA5	#FFFFFF	#000000	##FFFFFF
##373DA5	1.00	8.85	2.37	8.85
#FFFFFF	8.85	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA8

Deuteranopia (green-blind)

#0045A3

Tritanopia (blue-blind)

#00576B

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #373da5;
/* rgb */ color: rgb(55, 61, 165);
/* oklch */ color: oklch(42.2% 0.165 274.4);

Tailwind

colors: {
  custom: {
    50: '#7b72c1',
    500: '#373da5',
    950: '#000000',
  },
}

SCSS

$custom: #373da5;
$custom-light: #7b72c1;
$custom-dark: #000000;

JSON

{
  "hex": "#373da5",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 165
  },
  "hsl": {
    "h": 236.727,
    "s": 50,
    "l": 43.137
  },
  "oklch": {
    "l": 0.42222,
    "c": 0.1645,
    "h": 274.4
  },
  "luminance": 0.06866
}

Semantic roles & 50–950 ramp

primary

#373DA5

secondary

#BFBB79

accent

#D24EDA

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #373DA5

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

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