#2F37B3#2F37B3

#2F37B3 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 42.0% C 0.192 H 271.9°. Best body text is #FFFFFF at 9.06:1 contrast (WCAG AA passes).

Color values

HEX	#2F37B3
RGB	rgb(47, 55, 179)
HSL	hsl(236, 58%, 44%)
HSV	hsv(236, 74%, 70%)
CMYK	cmyk(73.7%, 69.3%, 0%, 29.8%)
CIE-LAB	lab(30.86, 39.26, -66.35)
CIE-LCH	lch(30.86, 77.09, 300.61°)
OKLab	oklab(42.01% 0.0064 -0.1919)
OKLCH	oklch(42.01% 0.192 271.9)
XYZ	xyz(10.6724, 6.5903, 43.3487)
Luminance	0.0659 (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

#2F37B3 #B3AB2F

analogous

#2F79B3 #2F37B3 #692FB3

triadic

#2F37B3 #B32F37 #37B32F

tetradic

#2F37B3 #B32F79 #B3AB2F #2FB369

square

#2F37B3 #B32F79 #B3AB2F #2FB369

split-complementary

#2F37B3 #B3692F #79B32F

monochromatic

#161952 #222883 #2F37B3 #4F56D1 #7F85DD

Accessibility & contrast

On white

9.06

#2F37B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#2F37B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F37B3

9.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F37B3	#FFFFFF	#000000	##FFFFFF
##2F37B3	1.00	9.06	2.32	9.06
#FFFFFF	9.06	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB7

Deuteranopia (green-blind)

#0042B1

Tritanopia (blue-blind)

#005970

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #2f37b3;
/* rgb */ color: rgb(47, 55, 179);
/* oklch */ color: oklch(42.0% 0.192 271.9);

Tailwind

colors: {
  custom: {
    50: '#7c6ecb',
    500: '#2f37b3',
    950: '#000000',
  },
}

SCSS

$custom: #2f37b3;
$custom-light: #7c6ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#2f37b3",
  "rgb": {
    "r": 47,
    "g": 55,
    "b": 179
  },
  "hsl": {
    "h": 236.364,
    "s": 58.407,
    "l": 44.314
  },
  "oklch": {
    "l": 0.4201,
    "c": 0.19203,
    "h": 271.9
  },
  "luminance": 0.06591
}

Semantic roles & 50–950 ramp

primary

#2F37B3

secondary

#C6C178

accent

#D846E2

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #2F37B3

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

Preview Lab → · Contrast checker → · Palette generator →