#2F31AB#2F31AB

#2F31AB is a dark, vivid blue. Relative luminance 0.057; OKLCH L 40.3% C 0.188 H 273.3°. Best body text is #FFFFFF at 9.78:1 contrast (WCAG AA passes).

Color values

HEX	#2F31AB
RGB	rgb(47, 49, 171)
HSL	hsl(239, 57%, 43%)
HSV	hsv(239, 73%, 67%)
CMYK	cmyk(72.5%, 71.3%, 0%, 32.9%)
CIE-LAB	lab(28.75, 40.13, -65.03)
CIE-LCH	lch(28.75, 76.42, 301.68°)
OKLab	oklab(40.26% 0.0109 -0.1881)
OKLCH	oklch(40.26% 0.188 273.3)
XYZ	xyz(9.6188, 5.7403, 39.1212)
Luminance	0.0574 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.48

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F31AB #ABA92F

analogous

#2F6FAB #2F31AB #6B2FAB

triadic

#2F31AB #AB2F31 #31AB2F

tetradic

#2F31AB #AB2F6F #ABA92F #2FAB6B

square

#2F31AB #AB2F6F #ABA92F #2FAB6B

split-complementary

#2F31AB #AB6B2F #6FAB2F

monochromatic

#15154B #22237B #2F31AB #4A4CCD #7A7CDA

Accessibility & contrast

On white

9.78

#2F31AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#2F31AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F31AB

9.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F31AB	#FFFFFF	#000000	##FFFFFF
##2F31AB	1.00	9.78	2.15	9.78
#FFFFFF	9.78	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AAF

Deuteranopia (green-blind)

#003EA9

Tritanopia (blue-blind)

#00536A

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #2f31ab;
/* rgb */ color: rgb(47, 49, 171);
/* oklch */ color: oklch(40.3% 0.188 273.3);

Tailwind

colors: {
  custom: {
    50: '#7a6ac5',
    500: '#2f31ab',
    950: '#000000',
  },
}

SCSS

$custom: #2f31ab;
$custom-light: #7a6ac5;
$custom-dark: #000000;

JSON

{
  "hex": "#2f31ab",
  "rgb": {
    "r": 47,
    "g": 49,
    "b": 171
  },
  "hsl": {
    "h": 239.032,
    "s": 56.881,
    "l": 42.745
  },
  "oklch": {
    "l": 0.40257,
    "c": 0.18839,
    "h": 273.3
  },
  "luminance": 0.05741
}

Semantic roles & 50–950 ramp

primary

#2F31AB

secondary

#C3C173

accent

#DE48E0

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #2F31AB

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

Preview Lab → · Contrast checker → · Palette generator →