#2D378B#2D378B

#2D378B is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.2% C 0.139 H 272.8°. Best body text is #FFFFFF at 10.34:1 contrast (WCAG AA passes).

Color values

HEX	#2D378B
RGB	rgb(45, 55, 139)
HSL	hsl(234, 51%, 36%)
HSV	hsv(234, 68%, 55%)
CMYK	cmyk(67.6%, 60.4%, 0%, 45.5%)
CIE-LAB	lab(27.17, 24.58, -48.11)
CIE-LCH	lch(27.17, 54.02, 297.06°)
OKLab	oklab(38.18% 0.0068 -0.1385)
OKLCH	oklch(38.18% 0.139 272.8)
XYZ	xyz(7.1070, 5.1537, 25.0413)
Luminance	0.0515 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2D378B #8B812D

analogous

#2D668B #2D378B #522D8B

triadic

#2D378B #8B2D37 #378B2D

tetradic

#2D378B #8B2D66 #8B812D #2D8B52

square

#2D378B #8B2D66 #8B812D #2D8B52

split-complementary

#2D378B #8B522D #668B2D

monochromatic

#0F122F #1E255D #2D378B #3C49B9 #6570CD

Accessibility & contrast

On white

10.34

#2D378B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#2D378B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2D378B

10.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2D378B	#FFFFFF	#000000	##FFFFFF
##2D378B	1.00	10.34	2.03	10.34
#FFFFFF	10.34	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458E

Deuteranopia (green-blind)

#003C89

Tritanopia (blue-blind)

#004C5B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #2d378b;
/* rgb */ color: rgb(45, 55, 139);
/* oklch */ color: oklch(38.2% 0.139 272.8);

Tailwind

colors: {
  custom: {
    50: '#726dae',
    500: '#2d378b',
    950: '#000000',
  },
}

SCSS

$custom: #2d378b;
$custom-light: #726dae;
$custom-dark: #000000;

JSON

{
  "hex": "#2d378b",
  "rgb": {
    "r": 45,
    "g": 55,
    "b": 139
  },
  "hsl": {
    "h": 233.617,
    "s": 51.087,
    "l": 36.078
  },
  "oklch": {
    "l": 0.38182,
    "c": 0.1387,
    "h": 272.8
  },
  "luminance": 0.05154
}

Semantic roles & 50–950 ramp

primary

#2D378B

secondary

#B4AB60

accent

#CC4DDB

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#090710

muted

#7B7A7F

Preview Lab

Preview with #2D378B

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

Preview Lab → · Contrast checker → · Palette generator →