#37579B#37579B

#37579B is a mid, moderate blue. Relative luminance 0.100; OKLCH L 46.8% C 0.117 H 263.6°. Best body text is #FFFFFF at 7.00:1 contrast (WCAG AA passes).

Color values

HEX	#37579B
RGB	rgb(55, 87, 155)
HSL	hsl(221, 48%, 41%)
HSV	hsv(221, 65%, 61%)
CMYK	cmyk(64.5%, 43.9%, 0%, 39.2%)
CIE-LAB	lab(37.83, 10.87, -40.65)
CIE-LCH	lch(37.83, 42.08, 284.97°)
OKLab	oklab(46.77% -0.0131 -0.1159)
OKLCH	oklch(46.77% 0.117 263.6)
XYZ	xyz(10.8981, 9.9942, 32.3587)
Luminance	0.0999 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#37579B #9B7B37

analogous

#37899B #37579B #49379B

triadic

#37579B #9B3757 #579B37

tetradic

#37579B #9B3789 #9B7B37 #379B49

square

#37579B #9B3789 #9B7B37 #379B49

split-complementary

#37579B #9B4937 #899B37

monochromatic

#172441 #273E6E #37579B #4F73C0 #7C97D0

Accessibility & contrast

On white

7.00

#37579B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

3.00

#37579B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #37579B

7.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##37579B	#FFFFFF	#000000	##FFFFFF
##37579B	1.00	7.00	3.00	7.00
#FFFFFF	7.00	1.00	21.00	1.00
#000000	3.00	21.00	1.00	21.00
##FFFFFF	7.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#385E9E

Deuteranopia (green-blind)

#28559A

Tritanopia (blue-blind)

#006671

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #37579b;
/* rgb */ color: rgb(55, 87, 155);
/* oklch */ color: oklch(46.8% 0.117 263.6);

Tailwind

colors: {
  custom: {
    50: '#7886b9',
    500: '#37579b',
    950: '#000000',
  },
}

SCSS

$custom: #37579b;
$custom-light: #7886b9;
$custom-dark: #000000;

JSON

{
  "hex": "#37579b",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 155
  },
  "hsl": {
    "h": 220.8,
    "s": 47.619,
    "l": 41.176
  },
  "oklch": {
    "l": 0.46769,
    "c": 0.11668,
    "h": 263.6
  },
  "luminance": 0.09995
}

Semantic roles & 50–950 ramp

primary

#37579B

secondary

#BAA374

accent

#AC51D7

background

#F7F8FB

surface

#EEEFF6

border

#C9CAD0

text

#0A0B11

muted

#7C7C80

Preview Lab

Preview with #37579B

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

Preview Lab → · Contrast checker → · Palette generator →