#37399D#37399D

#37399D is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.8% C 0.159 H 275.9°. Best body text is #FFFFFF at 9.40:1 contrast (WCAG AA passes).

Color values

HEX	#37399D
RGB	rgb(55, 57, 157)
HSL	hsl(239, 48%, 42%)
HSV	hsv(239, 65%, 62%)
CMYK	cmyk(65%, 63.7%, 0%, 38.4%)
CIE-LAB	lab(29.84, 31.33, -54.76)
CIE-LCH	lch(29.84, 63.09, 299.77°)
OKLab	oklab(40.8% 0.0163 -0.1578)
OKLCH	oklch(40.8% 0.159 275.9)
XYZ	xyz(9.1225, 6.1720, 32.6023)
Luminance	0.0617 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 7.22

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37399D #9D9B37

analogous

#376C9D #37399D #68379D

triadic

#37399D #9D3739 #399D37

tetradic

#37399D #9D376C #9D9B37 #379D68

square

#37399D #9D376C #9D9B37 #379D68

split-complementary

#37399D #9D6837 #6C9D37

monochromatic

#171842 #272970 #37399D #5052C2 #7D7FD1

Accessibility & contrast

On white

9.40

#37399D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#37399D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37399D

9.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37399D	#FFFFFF	#000000	##FFFFFF
##37399D	1.00	9.40	2.23	9.40
#FFFFFF	9.40	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA0

Deuteranopia (green-blind)

#00429B

Tritanopia (blue-blind)

#005265

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #37399d;
/* rgb */ color: rgb(55, 57, 157);
/* oklch */ color: oklch(40.8% 0.159 275.9);

Tailwind

colors: {
  custom: {
    50: '#7a6fbb',
    500: '#37399d',
    950: '#000000',
  },
}

SCSS

$custom: #37399d;
$custom-light: #7a6fbb;
$custom-dark: #000000;

JSON

{
  "hex": "#37399d",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 157
  },
  "hsl": {
    "h": 238.824,
    "s": 48.113,
    "l": 41.569
  },
  "oklch": {
    "l": 0.40797,
    "c": 0.15863,
    "h": 275.9
  },
  "luminance": 0.06173
}

Semantic roles & 50–950 ramp

primary

#37399D

secondary

#BBB975

accent

#D550D8

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #37399D

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

Preview Lab → · Contrast checker → · Palette generator →