#2F31A5#2F31A5

#2F31A5 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.7% C 0.181 H 273.7°. Best body text is #FFFFFF at 9.98:1 contrast (WCAG AA passes).

Color values

HEX	#2F31A5
RGB	rgb(47, 49, 165)
HSL	hsl(239, 56%, 42%)
HSV	hsv(239, 72%, 65%)
CMYK	cmyk(71.5%, 70.3%, 0%, 35.3%)
CIE-LAB	lab(28.16, 38.06, -62.39)
CIE-LCH	lch(28.16, 73.08, 301.39°)
OKLab	oklab(39.66% 0.0117 -0.1804)
OKLCH	oklch(39.66% 0.181 273.7)
XYZ	xyz(9.0599, 5.5167, 36.1774)
Luminance	0.0552 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F31A5 #A5A32F

analogous

#2F6CA5 #2F31A5 #682FA5

triadic

#2F31A5 #A52F31 #31A52F

tetradic

#2F31A5 #A52F6C #A5A32F #2FA568

square

#2F31A5 #A52F6C #A5A32F #2FA568

split-complementary

#2F31A5 #A5682F #6CA52F

monochromatic

#141546 #212375 #2F31A5 #4749CB #7678D8

Accessibility & contrast

On white

9.98

#2F31A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#2F31A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F31A5

9.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F31A5	#FFFFFF	#000000	##FFFFFF
##2F31A5	1.00	9.98	2.10	9.98
#FFFFFF	9.98	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048A9

Deuteranopia (green-blind)

#003DA3

Tritanopia (blue-blind)

#005167

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #2f31a5;
/* rgb */ color: rgb(47, 49, 165);
/* oklch */ color: oklch(39.7% 0.181 273.7);

Tailwind

colors: {
  custom: {
    50: '#796ac1',
    500: '#2f31a5',
    950: '#000000',
  },
}

SCSS

$custom: #2f31a5;
$custom-light: #796ac1;
$custom-dark: #000000;

JSON

{
  "hex": "#2f31a5",
  "rgb": {
    "r": 47,
    "g": 49,
    "b": 165
  },
  "hsl": {
    "h": 238.983,
    "s": 55.66,
    "l": 41.569
  },
  "oklch": {
    "l": 0.39656,
    "c": 0.18074,
    "h": 273.7
  },
  "luminance": 0.05518
}

Semantic roles & 50–950 ramp

primary

#2F31A5

secondary

#C0BF70

accent

#DC49DF

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #2F31A5

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

Preview Lab → · Contrast checker → · Palette generator →