#37399B#37399B

#37399B is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.6% C 0.156 H 276.1°. Best body text is #FFFFFF at 9.46:1 contrast (WCAG AA passes).

Color values

HEX	#37399B
RGB	rgb(55, 57, 155)
HSL	hsl(239, 48%, 41%)
HSV	hsv(239, 65%, 61%)
CMYK	cmyk(64.5%, 63.2%, 0%, 39.2%)
CIE-LAB	lab(29.67, 30.63, -53.82)
CIE-LCH	lch(29.67, 61.93, 299.64°)
OKLab	oklab(40.62% 0.0164 -0.155)
OKLCH	oklch(40.62% 0.156 276.1)
XYZ	xyz(8.9531, 6.1043, 31.7104)
Luminance	0.0611 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37399B #9B9937

analogous

#376B9B #37399B #67379B

triadic

#37399B #9B3739 #399B37

tetradic

#37399B #9B376B #9B9937 #379B67

square

#37399B #9B376B #9B9937 #379B67

split-complementary

#37399B #9B6737 #6B9B37

monochromatic

#171841 #27286E #37399B #4F51C0 #7C7ED0

Accessibility & contrast

On white

9.46

#37399B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#37399B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #37399B

9.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37399B	#FFFFFF	#000000	##FFFFFF
##37399B	1.00	9.46	2.22	9.46
#FFFFFF	9.46	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9E

Deuteranopia (green-blind)

#004299

Tritanopia (blue-blind)

#005264

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #37399b;
/* rgb */ color: rgb(55, 57, 155);
/* oklch */ color: oklch(40.6% 0.156 276.1);

Tailwind

colors: {
  custom: {
    50: '#7a6fb9',
    500: '#37399b',
    950: '#000000',
  },
}

SCSS

$custom: #37399b;
$custom-light: #7a6fb9;
$custom-dark: #000000;

JSON

{
  "hex": "#37399b",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 155
  },
  "hsl": {
    "h": 238.8,
    "s": 47.619,
    "l": 41.176
  },
  "oklch": {
    "l": 0.40621,
    "c": 0.1559,
    "h": 276.1
  },
  "luminance": 0.06105
}

Semantic roles & 50–950 ramp

primary

#37399B

secondary

#BAB874

accent

#D551D7

background

#F7F6FB

surface

#EEECF6

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #37399B

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

Preview Lab → · Contrast checker → · Palette generator →