#2B378B#2B378B

#2B378B is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.1% C 0.139 H 271.9°. Best body text is #FFFFFF at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#2B378B
RGB	rgb(43, 55, 139)
HSL	hsl(233, 53%, 36%)
HSV	hsv(233, 69%, 55%)
CMYK	cmyk(69.1%, 60.4%, 0%, 45.5%)
CIE-LAB	lab(27.04, 24.26, -48.31)
CIE-LCH	lch(27.04, 54.06, 296.66°)
OKLab	oklab(38.06% 0.0045 -0.1392)
OKLCH	oklch(38.06% 0.139 271.9)
XYZ	xyz(7.0211, 5.1094, 25.0373)
Luminance	0.0511 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B378B #8B7F2B

analogous

#2B678B #2B378B #4F2B8B

triadic

#2B378B #8B2B37 #378B2B

tetradic

#2B378B #8B2B67 #8B7F2B #2B8B4F

square

#2B378B #8B2B67 #8B7F2B #2B8B4F

split-complementary

#2B378B #8B4F2B #678B2B

monochromatic

#0E122E #1D255C #2B378B #3949BA #6270CE

Accessibility & contrast

On white

10.39

#2B378B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#2B378B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2B378B

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B378B	#FFFFFF	#000000	##FFFFFF
##2B378B	1.00	10.39	2.02	10.39
#FFFFFF	10.39	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448E

Deuteranopia (green-blind)

#003C89

Tritanopia (blue-blind)

#004C5B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #2b378b;
/* rgb */ color: rgb(43, 55, 139);
/* oklch */ color: oklch(38.1% 0.139 271.9);

Tailwind

colors: {
  custom: {
    50: '#716dae',
    500: '#2b378b',
    950: '#000000',
  },
}

SCSS

$custom: #2b378b;
$custom-light: #716dae;
$custom-dark: #000000;

JSON

{
  "hex": "#2b378b",
  "rgb": {
    "r": 43,
    "g": 55,
    "b": 139
  },
  "hsl": {
    "h": 232.5,
    "s": 52.747,
    "l": 35.686
  },
  "oklch": {
    "l": 0.38056,
    "c": 0.13926,
    "h": 271.9
  },
  "luminance": 0.0511
}

Semantic roles & 50–950 ramp

primary

#2B378B

secondary

#B5AA5D

accent

#CA4CDC

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #2B378B

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

Preview Lab → · Contrast checker → · Palette generator →