#2F37B4#2F37B4

#2F37B4 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 42.1% C 0.193 H 271.9°. Best body text is #FFFFFF at 9.03:1 contrast (WCAG AA passes).

Color values

HEX	#2F37B4
RGB	rgb(47, 55, 180)
HSL	hsl(236, 59%, 45%)
HSV	hsv(236, 74%, 71%)
CMYK	cmyk(73.9%, 69.4%, 0%, 29.4%)
CIE-LAB	lab(30.95, 39.60, -66.78)
CIE-LCH	lch(30.95, 77.64, 300.67°)
OKLab	oklab(42.11% 0.0063 -0.1932)
OKLCH	oklch(42.11% 0.193 271.9)
XYZ	xyz(10.7739, 6.6309, 43.8833)
Luminance	0.0663 (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

#2F37B4 #B4AC2F

analogous

#2F7AB4 #2F37B4 #6A2FB4

triadic

#2F37B4 #B42F37 #37B42F

tetradic

#2F37B4 #B42F7A #B4AC2F #2FB46A

square

#2F37B4 #B42F7A #B4AC2F #2FB46A

split-complementary

#2F37B4 #B46A2F #7AB42F

monochromatic

#161953 #222883 #2F37B4 #4F57D1 #8085DE

Accessibility & contrast

On white

9.03

#2F37B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#2F37B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F37B4

9.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F37B4	#FFFFFF	#000000	##FFFFFF
##2F37B4	1.00	9.03	2.33	9.03
#FFFFFF	9.03	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB8

Deuteranopia (green-blind)

#0042B2

Tritanopia (blue-blind)

#005971

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #2f37b4;
/* rgb */ color: rgb(47, 55, 180);
/* oklch */ color: oklch(42.1% 0.193 271.9);

Tailwind

colors: {
  custom: {
    50: '#7c6ecc',
    500: '#2f37b4',
    950: '#000000',
  },
}

SCSS

$custom: #2f37b4;
$custom-light: #7c6ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#2f37b4",
  "rgb": {
    "r": 47,
    "g": 55,
    "b": 180
  },
  "hsl": {
    "h": 236.391,
    "s": 58.59,
    "l": 44.51
  },
  "oklch": {
    "l": 0.42108,
    "c": 0.19329,
    "h": 271.9
  },
  "luminance": 0.06632
}

Semantic roles & 50–950 ramp

primary

#2F37B4

secondary

#C7C278

accent

#D846E2

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #2F37B4

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

Preview Lab → · Contrast checker → · Palette generator →