#1D3371#1D3371

#1D3371 is a dark, moderate blue. Relative luminance 0.038; OKLCH L 34.2% C 0.111 H 266.0°. Best body text is #FFFFFF at 11.90:1 contrast (WCAG AA passes).

Color values

HEX	#1D3371
RGB	rgb(29, 51, 113)
HSL	hsl(224, 59%, 28%)
HSV	hsv(224, 74%, 44%)
CMYK	cmyk(74.3%, 54.9%, 0%, 55.7%)
CIE-LAB	lab(23.07, 14.73, -38.42)
CIE-LCH	lch(23.07, 41.15, 290.98°)
OKLab	oklab(34.21% -0.0078 -0.1105)
OKLCH	oklch(34.21% 0.111 266)
XYZ	xyz(4.6701, 3.8206, 16.1109)
Luminance	0.0382 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3371 #715B1D

analogous

#1D5D71 #1D3371 #311D71

triadic

#1D3371 #711D33 #33711D

tetradic

#1D3371 #711D5D #715B1D #1D7131

square

#1D3371 #711D5D #715B1D #1D7131

split-complementary

#1D3371 #71311D #5D711D

monochromatic

#060B18 #111D40 #1D3371 #2949A2 #3C62CD

Accessibility & contrast

On white

11.90

#1D3371 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#1D3371 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3371

11.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3371	#FFFFFF	#000000	##FFFFFF
##1D3371	1.00	11.90	1.76	11.90
#FFFFFF	11.90	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A3B73

Deuteranopia (green-blind)

#003370

Tritanopia (blue-blind)

#00424C

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1d3371;
/* rgb */ color: rgb(29, 51, 113);
/* oklch */ color: oklch(34.2% 0.111 266.0);

Tailwind

colors: {
  custom: {
    50: '#656a9a',
    500: '#1d3371',
    950: '#000000',
  },
}

SCSS

$custom: #1d3371;
$custom-light: #656a9a;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3371",
  "rgb": {
    "r": 29,
    "g": 51,
    "b": 113
  },
  "hsl": {
    "h": 224.286,
    "s": 59.155,
    "l": 27.843
  },
  "oklch": {
    "l": 0.34212,
    "c": 0.11076,
    "h": 266
  },
  "luminance": 0.03821
}

Semantic roles & 50–950 ramp

primary

#1D3371

secondary

#A58C44

accent

#B945E2

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1D3371

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

Preview Lab → · Contrast checker → · Palette generator →