#1D3773#1D3773

#1D3773 is a dark, moderate blue. Relative luminance 0.042; OKLCH L 35.3% C 0.108 H 264.0°. Best body text is #FFFFFF at 11.37:1 contrast (WCAG AA passes).

Color values

HEX	#1D3773
RGB	rgb(29, 55, 115)
HSL	hsl(222, 60%, 28%)
HSV	hsv(222, 75%, 45%)
CMYK	cmyk(74.8%, 52.2%, 0%, 54.9%)
CIE-LAB	lab(24.42, 12.70, -37.52)
CIE-LCH	lch(24.42, 39.61, 288.70°)
OKLab	oklab(35.29% -0.0113 -0.1077)
OKLCH	oklch(35.29% 0.108 264)
XYZ	xyz(4.9663, 4.2309, 16.7712)
Luminance	0.0423 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3773 #73591D

analogous

#1D6273 #1D3773 #2E1D73

triadic

#1D3773 #731D37 #37731D

tetradic

#1D3773 #731D62 #73591D #1D732E

square

#1D3773 #731D62 #73591D #1D732E

split-complementary

#1D3773 #732E1D #62731D

monochromatic

#060C18 #112042 #1D3773 #294EA4 #3C68CE

Accessibility & contrast

On white

11.37

#1D3773 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1D3773 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3773

11.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3773	#FFFFFF	#000000	##FFFFFF
##1D3773	1.00	11.37	1.85	11.37
#FFFFFF	11.37	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#143E75

Deuteranopia (green-blind)

#003672

Tritanopia (blue-blind)

#00454F

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1d3773;
/* rgb */ color: rgb(29, 55, 115);
/* oklch */ color: oklch(35.3% 0.108 264.0);

Tailwind

colors: {
  custom: {
    50: '#656d9c',
    500: '#1d3773',
    950: '#000000',
  },
}

SCSS

$custom: #1d3773;
$custom-light: #656d9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3773",
  "rgb": {
    "r": 29,
    "g": 55,
    "b": 115
  },
  "hsl": {
    "h": 221.86,
    "s": 59.722,
    "l": 28.235
  },
  "oklch": {
    "l": 0.35287,
    "c": 0.10834,
    "h": 264
  },
  "luminance": 0.04231
}

Semantic roles & 50–950 ramp

primary

#1D3773

secondary

#A78945

accent

#B345E3

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #1D3773

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

Preview Lab → · Contrast checker → · Palette generator →