#2F43B1#2F43B1

#2F43B1 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.9% C 0.175 H 269.6°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#2F43B1
RGB	rgb(47, 67, 177)
HSL	hsl(231, 58%, 44%)
HSV	hsv(231, 73%, 69%)
CMYK	cmyk(73.4%, 62.1%, 0%, 30.6%)
CIE-LAB	lab(33.55, 30.93, -60.75)
CIE-LCH	lch(33.55, 68.17, 296.99°)
OKLab	oklab(43.92% -0.0011 -0.1755)
OKLCH	oklch(43.92% 0.175 269.6)
XYZ	xyz(11.1125, 7.7918, 42.5048)
Luminance	0.0779 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F43B1 #B19D2F

analogous

#2F84B1 #2F43B1 #5C2FB1

triadic

#2F43B1 #B12F43 #43B12F

tetradic

#2F43B1 #B12F84 #B19D2F #2FB15C

square

#2F43B1 #B12F84 #B19D2F #2FB15C

split-complementary

#2F43B1 #B15C2F #84B12F

monochromatic

#151E50 #223181 #2F43B1 #4D61D0 #7E8CDD

Accessibility & contrast

On white

8.21

#2F43B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#2F43B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F43B1

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F43B1	#FFFFFF	#000000	##FFFFFF
##2F43B1	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B5

Deuteranopia (green-blind)

#0049AF

Tritanopia (blue-blind)

#005F73

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #2f43b1;
/* rgb */ color: rgb(47, 67, 177);
/* oklch */ color: oklch(43.9% 0.175 269.6);

Tailwind

colors: {
  custom: {
    50: '#7a77c9',
    500: '#2f43b1',
    950: '#000000',
  },
}

SCSS

$custom: #2f43b1;
$custom-light: #7a77c9;
$custom-dark: #000000;

JSON

{
  "hex": "#2f43b1",
  "rgb": {
    "r": 47,
    "g": 67,
    "b": 177
  },
  "hsl": {
    "h": 230.769,
    "s": 58.036,
    "l": 43.922
  },
  "oklch": {
    "l": 0.43921,
    "c": 0.17546,
    "h": 269.6
  },
  "luminance": 0.07793
}

Semantic roles & 50–950 ramp

primary

#2F43B1

secondary

#C5B976

accent

#C947E1

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #2F43B1

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

Preview Lab → · Contrast checker → · Palette generator →