#373FAF#373FAF

#373FAF is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.5% C 0.175 H 273.4°. Best body text is #FFFFFF at 8.43:1 contrast (WCAG AA passes).

Color values

HEX	#373FAF
RGB	rgb(55, 63, 175)
HSL	hsl(236, 52%, 45%)
HSV	hsv(236, 69%, 69%)
CMYK	cmyk(68.6%, 64%, 0%, 31.4%)
CIE-LAB	lab(32.84, 33.82, -60.70)
CIE-LCH	lch(32.84, 69.48, 299.12°)
OKLab	oklab(43.47% 0.0104 -0.1752)
OKLCH	oklch(43.47% 0.175 273.4)
XYZ	xyz(11.0883, 7.4614, 41.4050)
Luminance	0.0746 (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

#373FAF #AFA737

analogous

#377BAF #373FAF #6B37AF

triadic

#373FAF #AF373F #3FAF37

tetradic

#373FAF #AF377B #AFA737 #37AF6B

square

#373FAF #AF377B #AFA737 #37AF6B

split-complementary

#373FAF #AF6B37 #7BAF37

monochromatic

#1A1D52 #282E80 #373FAF #5960CB #878DD9

Accessibility & contrast

On white

8.43

#373FAF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#373FAF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FAF

8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FAF	#FFFFFF	#000000	##FFFFFF
##373FAF	1.00	8.43	2.49	8.43
#FFFFFF	8.43	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B3

Deuteranopia (green-blind)

#0048AD

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #373faf;
/* rgb */ color: rgb(55, 63, 175);
/* oklch */ color: oklch(43.5% 0.175 273.4);

Tailwind

colors: {
  custom: {
    50: '#7d74c8',
    500: '#373faf',
    950: '#000000',
  },
}

SCSS

$custom: #373faf;
$custom-light: #7d74c8;
$custom-dark: #000000;

JSON

{
  "hex": "#373faf",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 175
  },
  "hsl": {
    "h": 236,
    "s": 52.174,
    "l": 45.098
  },
  "oklch": {
    "l": 0.43466,
    "c": 0.17548,
    "h": 273.4
  },
  "luminance": 0.07462
}

Semantic roles & 50–950 ramp

primary

#373FAF

secondary

#C3BF7F

accent

#D24CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373FAF

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

Preview Lab → · Contrast checker → · Palette generator →