#373BB1#373BB1

#373BB1 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 43.0% C 0.183 H 274.1°. Best body text is #FFFFFF at 8.67:1 contrast (WCAG AA passes).

Color values

HEX	#373BB1
RGB	rgb(55, 59, 177)
HSL	hsl(238, 53%, 45%)
HSV	hsv(238, 69%, 69%)
CMYK	cmyk(68.9%, 66.7%, 0%, 30.6%)
CIE-LAB	lab(32.06, 37.03, -63.15)
CIE-LCH	lch(32.06, 73.21, 300.38°)
OKLab	oklab(42.96% 0.0131 -0.1824)
OKLCH	oklch(42.96% 0.183 274.1)
XYZ	xyz(11.0727, 7.1134, 42.3760)
Luminance	0.0711 (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

#373BB1 #B1AD37

analogous

#3778B1 #373BB1 #7037B1

triadic

#373BB1 #B1373B #3BB137

tetradic

#373BB1 #B13778 #B1AD37 #37B170

square

#373BB1 #B13778 #B1AD37 #37B170

split-complementary

#373BB1 #B17037 #78B137

monochromatic

#1A1C54 #282B82 #373BB1 #5A5DCC #888BDA

Accessibility & contrast

On white

8.67

#373BB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#373BB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373BB1

8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373BB1	#FFFFFF	#000000	##FFFFFF
##373BB1	1.00	8.67	2.42	8.67
#FFFFFF	8.67	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B5

Deuteranopia (green-blind)

#0046AF

Tritanopia (blue-blind)

#005A71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #373bb1;
/* rgb */ color: rgb(55, 59, 177);
/* oklch */ color: oklch(43.0% 0.183 274.1);

Tailwind

colors: {
  custom: {
    50: '#7e71c9',
    500: '#373bb1',
    950: '#000000',
  },
}

SCSS

$custom: #373bb1;
$custom-light: #7e71c9;
$custom-dark: #000000;

JSON

{
  "hex": "#373bb1",
  "rgb": {
    "r": 55,
    "g": 59,
    "b": 177
  },
  "hsl": {
    "h": 238.033,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.42957,
    "c": 0.18285,
    "h": 274.1
  },
  "luminance": 0.07114
}

Semantic roles & 50–950 ramp

primary

#373BB1

secondary

#C4C280

accent

#D74CDC

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373BB1

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

Preview Lab → · Contrast checker → · Palette generator →