#2B378D#2B378D

#2B378D is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.2% C 0.142 H 271.8°. Best body text is #FFFFFF at 10.33:1 contrast (WCAG AA passes).

Color values

HEX	#2B378D
RGB	rgb(43, 55, 141)
HSL	hsl(233, 53%, 36%)
HSV	hsv(233, 70%, 55%)
CMYK	cmyk(69.5%, 61%, 0%, 44.7%)
CIE-LAB	lab(27.21, 25.00, -49.28)
CIE-LCH	lch(27.21, 55.26, 296.90°)
OKLab	oklab(38.23% 0.0045 -0.142)
OKLCH	oklch(38.23% 0.142 271.8)
XYZ	xyz(7.1685, 5.1684, 25.8140)
Luminance	0.0517 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B378D #8D812B

analogous

#2B688D #2B378D #502B8D

triadic

#2B378D #8D2B37 #378D2B

tetradic

#2B378D #8D2B68 #8D812B #2B8D50

square

#2B378D #8D2B68 #8D812B #2B8D50

split-complementary

#2B378D #8D502B #688D2B

monochromatic

#0E122F #1D255E #2B378D #3949BC #6370CF

Accessibility & contrast

On white

10.33

#2B378D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#2B378D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2B378D

10.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B378D	#FFFFFF	#000000	##FFFFFF
##2B378D	1.00	10.33	2.03	10.33
#FFFFFF	10.33	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004590

Deuteranopia (green-blind)

#003C8B

Tritanopia (blue-blind)

#004C5C

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #2b378d;
/* rgb */ color: rgb(43, 55, 141);
/* oklch */ color: oklch(38.2% 0.142 271.8);

Tailwind

colors: {
  custom: {
    50: '#716daf',
    500: '#2b378d',
    950: '#000000',
  },
}

SCSS

$custom: #2b378d;
$custom-light: #716daf;
$custom-dark: #000000;

JSON

{
  "hex": "#2b378d",
  "rgb": {
    "r": 43,
    "g": 55,
    "b": 141
  },
  "hsl": {
    "h": 232.653,
    "s": 53.261,
    "l": 36.078
  },
  "oklch": {
    "l": 0.38231,
    "c": 0.14211,
    "h": 271.8
  },
  "luminance": 0.05169
}

Semantic roles & 50–950 ramp

primary

#2B378D

secondary

#B6AB5E

accent

#CB4BDD

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #2B378D

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

Preview Lab → · Contrast checker → · Palette generator →