#37399C#37399C

#37399C is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.7% C 0.157 H 276.0°. Best body text is #FFFFFF at 9.43:1 contrast (WCAG AA passes).

Color values

HEX	#37399C
RGB	rgb(55, 57, 156)
HSL	hsl(239, 48%, 41%)
HSV	hsv(239, 65%, 61%)
CMYK	cmyk(64.7%, 63.5%, 0%, 38.8%)
CIE-LAB	lab(29.76, 30.98, -54.29)
CIE-LCH	lch(29.76, 62.51, 299.71°)
OKLab	oklab(40.71% 0.0164 -0.1564)
OKLCH	oklch(40.71% 0.157 276)
XYZ	xyz(9.0375, 6.1380, 32.1545)
Luminance	0.0614 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37399C #9C9A37

analogous

#376C9C #37399C #68379C

triadic

#37399C #9C3739 #399C37

tetradic

#37399C #9C376C #9C9A37 #379C68

square

#37399C #9C376C #9C9A37 #379C68

split-complementary

#37399C #9C6837 #6C9C37

monochromatic

#171842 #27286F #37399C #4F51C1 #7C7ED1

Accessibility & contrast

On white

9.43

#37399C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#37399C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37399C

9.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37399C	#FFFFFF	#000000	##FFFFFF
##37399C	1.00	9.43	2.23	9.43
#FFFFFF	9.43	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9F

Deuteranopia (green-blind)

#00429A

Tritanopia (blue-blind)

#005265

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #37399c;
/* rgb */ color: rgb(55, 57, 156);
/* oklch */ color: oklch(40.7% 0.157 276.0);

Tailwind

colors: {
  custom: {
    50: '#7a6fba',
    500: '#37399c',
    950: '#000000',
  },
}

SCSS

$custom: #37399c;
$custom-light: #7a6fba;
$custom-dark: #000000;

JSON

{
  "hex": "#37399c",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 156
  },
  "hsl": {
    "h": 238.812,
    "s": 47.867,
    "l": 41.373
  },
  "oklch": {
    "l": 0.40709,
    "c": 0.15727,
    "h": 276
  },
  "luminance": 0.06139
}

Semantic roles & 50–950 ramp

primary

#37399C

secondary

#BAB975

accent

#D550D7

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #37399C

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

Preview Lab → · Contrast checker → · Palette generator →