#2F37B8#2F37B8

#2F37B8 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.5% C 0.198 H 271.7°. Best body text is #FFFFFF at 8.90:1 contrast (WCAG AA passes).

Color values

HEX	#2F37B8
RGB	rgb(47, 55, 184)
HSL	hsl(236, 59%, 45%)
HSV	hsv(236, 74%, 72%)
CMYK	cmyk(74.5%, 70.1%, 0%, 27.8%)
CIE-LAB	lab(31.34, 40.99, -68.52)
CIE-LCH	lch(31.34, 79.84, 300.89°)
OKLab	oklab(42.5% 0.0058 -0.1983)
OKLCH	oklch(42.5% 0.198 271.7)
XYZ	xyz(11.1873, 6.7962, 46.0603)
Luminance	0.0680 (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

#2F37B8 #B8B02F

analogous

#2F7CB8 #2F37B8 #6B2FB8

triadic

#2F37B8 #B82F37 #37B82F

tetradic

#2F37B8 #B82F7C #B8B02F #2FB86B

square

#2F37B8 #B82F7C #B8B02F #2FB86B

split-complementary

#2F37B8 #B86B2F #7CB82F

monochromatic

#161A57 #232887 #2F37B8 #5259D3 #8288DF

Accessibility & contrast

On white

8.90

#2F37B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#2F37B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F37B8

8.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F37B8	#FFFFFF	#000000	##FFFFFF
##2F37B8	1.00	8.90	2.36	8.90
#FFFFFF	8.90	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050BC

Deuteranopia (green-blind)

#0043B6

Tritanopia (blue-blind)

#005B73

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #2f37b8;
/* rgb */ color: rgb(47, 55, 184);
/* oklch */ color: oklch(42.5% 0.198 271.7);

Tailwind

colors: {
  custom: {
    50: '#7d6ecf',
    500: '#2f37b8',
    950: '#000000',
  },
}

SCSS

$custom: #2f37b8;
$custom-light: #7d6ecf;
$custom-dark: #000000;

JSON

{
  "hex": "#2f37b8",
  "rgb": {
    "r": 47,
    "g": 55,
    "b": 184
  },
  "hsl": {
    "h": 236.496,
    "s": 59.307,
    "l": 45.294
  },
  "oklch": {
    "l": 0.42504,
    "c": 0.19834,
    "h": 271.7
  },
  "luminance": 0.06797
}

Semantic roles & 50–950 ramp

primary

#2F37B8

secondary

#C8C47B

accent

#D945E2

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0714

muted

#7C7A82

Preview Lab

Preview with #2F37B8

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

Preview Lab → · Contrast checker → · Palette generator →