#373FB9#373FB9

#373FB9 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.4% C 0.189 H 272.9°. Best body text is #FFFFFF at 8.16:1 contrast (WCAG AA passes).

Color values

HEX	#373FB9
RGB	rgb(55, 63, 185)
HSL	hsl(236, 54%, 47%)
HSV	hsv(236, 70%, 73%)
CMYK	cmyk(70.3%, 65.9%, 0%, 27.5%)
CIE-LAB	lab(33.71, 37.32, -65.20)
CIE-LCH	lch(33.71, 75.12, 299.78°)
OKLab	oklab(44.37% 0.0096 -0.1884)
OKLCH	oklch(44.37% 0.189 272.9)
XYZ	xyz(12.1071, 7.8688, 46.7703)
Luminance	0.0787 (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

#373FB9 #B9B137

analogous

#3780B9 #373FB9 #7037B9

triadic

#373FB9 #B9373F #3FB937

tetradic

#373FB9 #B93780 #B9B137 #37B970

square

#373FB9 #B93780 #B9B137 #37B970

split-complementary

#373FB9 #B97037 #80B937

monochromatic

#1B1F5B #292F8A #373FB9 #5E65CF #8D92DD

Accessibility & contrast

On white

8.16

#373FB9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#373FB9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FB9

8.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FB9	#FFFFFF	#000000	##FFFFFF
##373FB9	1.00	8.16	2.57	8.16
#FFFFFF	8.16	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BD

Deuteranopia (green-blind)

#0049B7

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #373fb9;
/* rgb */ color: rgb(55, 63, 185);
/* oklch */ color: oklch(44.4% 0.189 272.9);

Tailwind

colors: {
  custom: {
    50: '#8074cf',
    500: '#373fb9',
    950: '#000000',
  },
}

SCSS

$custom: #373fb9;
$custom-light: #8074cf;
$custom-dark: #000000;

JSON

{
  "hex": "#373fb9",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 185
  },
  "hsl": {
    "h": 236.308,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.44373,
    "c": 0.18861,
    "h": 272.9
  },
  "luminance": 0.0787
}

Semantic roles & 50–950 ramp

primary

#373FB9

secondary

#C8C484

accent

#D44ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #373FB9

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

Preview Lab → · Contrast checker → · Palette generator →