#2F37B0#2F37B0

#2F37B0 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.7% C 0.188 H 272.0°. Best body text is #FFFFFF at 9.15:1 contrast (WCAG AA passes).

Color values

HEX	#2F37B0
RGB	rgb(47, 55, 176)
HSL	hsl(236, 58%, 44%)
HSV	hsv(236, 73%, 69%)
CMYK	cmyk(73.3%, 68.8%, 0%, 31%)
CIE-LAB	lab(30.57, 38.21, -65.03)
CIE-LCH	lch(30.57, 75.42, 300.44°)
OKLab	oklab(41.72% 0.0067 -0.1881)
OKLCH	oklch(41.72% 0.188 272)
XYZ	xyz(10.3723, 6.4702, 41.7681)
Luminance	0.0647 (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

#2F37B0 #B0A82F

analogous

#2F77B0 #2F37B0 #672FB0

triadic

#2F37B0 #B02F37 #37B02F

tetradic

#2F37B0 #B02F77 #B0A82F #2FB067

square

#2F37B0 #B02F77 #B0A82F #2FB067

split-complementary

#2F37B0 #B0672F #77B02F

monochromatic

#15194F #222880 #2F37B0 #4D55CF #7D83DC

Accessibility & contrast

On white

9.15

#2F37B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#2F37B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F37B0

9.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F37B0	#FFFFFF	#000000	##FFFFFF
##2F37B0	1.00	9.15	2.29	9.15
#FFFFFF	9.15	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB4

Deuteranopia (green-blind)

#0042AE

Tritanopia (blue-blind)

#00586F

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #2f37b0;
/* rgb */ color: rgb(47, 55, 176);
/* oklch */ color: oklch(41.7% 0.188 272.0);

Tailwind

colors: {
  custom: {
    50: '#7b6ec9',
    500: '#2f37b0',
    950: '#000000',
  },
}

SCSS

$custom: #2f37b0;
$custom-light: #7b6ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#2f37b0",
  "rgb": {
    "r": 47,
    "g": 55,
    "b": 176
  },
  "hsl": {
    "h": 236.279,
    "s": 57.848,
    "l": 43.725
  },
  "oklch": {
    "l": 0.41716,
    "c": 0.18819,
    "h": 272
  },
  "luminance": 0.06471
}

Semantic roles & 50–950 ramp

primary

#2F37B0

secondary

#C5C076

accent

#D847E1

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #2F37B0

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

Preview Lab → · Contrast checker → · Palette generator →