#1D2378#1D2378

#1D2378 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.6% C 0.142 H 272.0°. Best body text is #FFFFFF at 13.43:1 contrast (WCAG AA passes).

Color values

HEX	#1D2378
RGB	rgb(29, 35, 120)
HSL	hsl(236, 61%, 29%)
HSV	hsv(236, 76%, 47%)
CMYK	cmyk(75.8%, 70.8%, 0%, 52.9%)
CIE-LAB	lab(19.30, 28.67, -49.05)
CIE-LCH	lch(19.30, 56.81, 300.31°)
OKLab	oklab(31.61% 0.0049 -0.1418)
OKLCH	oklch(31.61% 0.142 272)
XYZ	xyz(4.4967, 2.8189, 18.0728)
Luminance	0.0282 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D2378 #78721D

analogous

#1D5178 #1D2378 #451D78

triadic

#1D2378 #781D23 #23781D

tetradic

#1D2378 #781D51 #78721D #1D7845

square

#1D2378 #781D51 #78721D #1D7845

split-complementary

#1D2378 #78451D #51781D

monochromatic

#060719 #111547 #1D2378 #2931A9 #3F48D1

Accessibility & contrast

On white

13.43

#1D2378 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1D2378 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D2378

13.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D2378	#FFFFFF	#000000	##FFFFFF
##1D2378	1.00	13.43	1.56	13.43
#FFFFFF	13.43	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00337B

Deuteranopia (green-blind)

#002A76

Tritanopia (blue-blind)

#003A4A

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1d2378;
/* rgb */ color: rgb(29, 35, 120);
/* oklch */ color: oklch(31.6% 0.142 272.0);

Tailwind

colors: {
  custom: {
    50: '#685ea0',
    500: '#1d2378',
    950: '#000000',
  },
}

SCSS

$custom: #1d2378;
$custom-light: #685ea0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d2378",
  "rgb": {
    "r": 29,
    "g": 35,
    "b": 120
  },
  "hsl": {
    "h": 236.044,
    "s": 61.074,
    "l": 29.216
  },
  "oklch": {
    "l": 0.3161,
    "c": 0.14192,
    "h": 272
  },
  "luminance": 0.02819
}

Semantic roles & 50–950 ramp

primary

#1D2378

secondary

#ACA545

accent

#DA44E4

background

#F6F5F9

surface

#ECE9F2

border

#C7C5CC

text

#07040F

muted

#7A797E

Preview Lab

Preview with #1D2378

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

Preview Lab → · Contrast checker → · Palette generator →