#373AAF#373AAF

#373AAF is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.6% C 0.181 H 274.4°. Best body text is #FFFFFF at 8.80:1 contrast (WCAG AA passes).

Color values

HEX	#373AAF
RGB	rgb(55, 58, 175)
HSL	hsl(239, 52%, 45%)
HSV	hsv(239, 69%, 69%)
CMYK	cmyk(68.6%, 66.9%, 0%, 31.4%)
CIE-LAB	lab(31.65, 36.96, -62.63)
CIE-LCH	lch(31.65, 72.72, 300.54°)
OKLab	oklab(42.6% 0.014 -0.1809)
OKLCH	oklch(42.6% 0.181 274.4)
XYZ	xyz(10.8239, 6.9325, 41.3168)
Luminance	0.0693 (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

#373AAF #AFAC37

analogous

#3776AF #373AAF #7037AF

triadic

#373AAF #AF373A #3AAF37

tetradic

#373AAF #AF3776 #AFAC37 #37AF70

square

#373AAF #AF3776 #AFAC37 #37AF70

split-complementary

#373AAF #AF7037 #76AF37

monochromatic

#1A1B52 #282B80 #373AAF #595BCB #8789D9

Accessibility & contrast

On white

8.80

#373AAF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#373AAF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373AAF

8.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373AAF	#FFFFFF	#000000	##FFFFFF
##373AAF	1.00	8.80	2.39	8.80
#FFFFFF	8.80	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B3

Deuteranopia (green-blind)

#0045AD

Tritanopia (blue-blind)

#00596F

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #373aaf;
/* rgb */ color: rgb(55, 58, 175);
/* oklch */ color: oklch(42.6% 0.181 274.4);

Tailwind

colors: {
  custom: {
    50: '#7e71c8',
    500: '#373aaf',
    950: '#000000',
  },
}

SCSS

$custom: #373aaf;
$custom-light: #7e71c8;
$custom-dark: #000000;

JSON

{
  "hex": "#373aaf",
  "rgb": {
    "r": 55,
    "g": 58,
    "b": 175
  },
  "hsl": {
    "h": 238.5,
    "s": 52.174,
    "l": 45.098
  },
  "oklch": {
    "l": 0.42603,
    "c": 0.18141,
    "h": 274.4
  },
  "luminance": 0.06933
}

Semantic roles & 50–950 ramp

primary

#373AAF

secondary

#C3C27F

accent

#D84CDC

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #373AAF

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

Preview Lab → · Contrast checker → · Palette generator →