#2F3FB1#2F3FB1

#2F3FB1 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.2% C 0.180 H 270.5°. Best body text is #FFFFFF at 8.51:1 contrast (WCAG AA passes).

Color values

HEX	#2F3FB1
RGB	rgb(47, 63, 177)
HSL	hsl(233, 58%, 44%)
HSV	hsv(233, 73%, 69%)
CMYK	cmyk(73.4%, 64.4%, 0%, 30.6%)
CIE-LAB	lab(32.55, 33.52, -62.37)
CIE-LCH	lch(32.55, 70.81, 298.25°)
OKLab	oklab(43.19% 0.0016 -0.1803)
OKLCH	oklch(43.19% 0.18 270.5)
XYZ	xyz(10.8829, 7.3325, 42.4282)
Luminance	0.0733 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F3FB1 #B1A12F

analogous

#2F80B1 #2F3FB1 #602FB1

triadic

#2F3FB1 #B12F3F #3FB12F

tetradic

#2F3FB1 #B12F80 #B1A12F #2FB160

square

#2F3FB1 #B12F80 #B1A12F #2FB160

split-complementary

#2F3FB1 #B1602F #80B12F

monochromatic

#151D50 #222E81 #2F3FB1 #4D5DD0 #7E89DD

Accessibility & contrast

On white

8.51

#2F3FB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#2F3FB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F3FB1

8.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F3FB1	#FFFFFF	#000000	##FFFFFF
##2F3FB1	1.00	8.51	2.47	8.51
#FFFFFF	8.51	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B5

Deuteranopia (green-blind)

#0047AF

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #2f3fb1;
/* rgb */ color: rgb(47, 63, 177);
/* oklch */ color: oklch(43.2% 0.180 270.5);

Tailwind

colors: {
  custom: {
    50: '#7b74c9',
    500: '#2f3fb1',
    950: '#000000',
  },
}

SCSS

$custom: #2f3fb1;
$custom-light: #7b74c9;
$custom-dark: #000000;

JSON

{
  "hex": "#2f3fb1",
  "rgb": {
    "r": 47,
    "g": 63,
    "b": 177
  },
  "hsl": {
    "h": 232.615,
    "s": 58.036,
    "l": 43.922
  },
  "oklch": {
    "l": 0.4319,
    "c": 0.18027,
    "h": 270.5
  },
  "luminance": 0.07334
}

Semantic roles & 50–950 ramp

primary

#2F3FB1

secondary

#C5BC76

accent

#CE47E1

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #2F3FB1

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

Preview Lab → · Contrast checker → · Palette generator →