#1D3973#1D3973

#1D3973 is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.8% C 0.106 H 262.8°. Best body text is #FFFFFF at 11.14:1 contrast (WCAG AA passes).

Color values

HEX	#1D3973
RGB	rgb(29, 57, 115)
HSL	hsl(220, 60%, 28%)
HSV	hsv(220, 75%, 45%)
CMYK	cmyk(74.8%, 50.4%, 0%, 54.9%)
CIE-LAB	lab(25.03, 11.29, -36.54)
CIE-LCH	lch(25.03, 38.24, 287.16°)
OKLab	oklab(35.75% -0.0132 -0.1048)
OKLCH	oklch(35.75% 0.106 262.8)
XYZ	xyz(5.0632, 4.4247, 16.8035)
Luminance	0.0442 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3973 #73571D

analogous

#1D6473 #1D3973 #2C1D73

triadic

#1D3973 #731D39 #39731D

tetradic

#1D3973 #731D64 #73571D #1D732C

square

#1D3973 #731D64 #73571D #1D732C

split-complementary

#1D3973 #732C1D #64731D

monochromatic

#060C18 #112142 #1D3973 #2951A4 #3C6CCE

Accessibility & contrast

On white

11.14

#1D3973 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#1D3973 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3973

11.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3973	#FFFFFF	#000000	##FFFFFF
##1D3973	1.00	11.14	1.89	11.14
#FFFFFF	11.14	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#194075

Deuteranopia (green-blind)

#023872

Tritanopia (blue-blind)

#004750

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1d3973;
/* rgb */ color: rgb(29, 57, 115);
/* oklch */ color: oklch(35.8% 0.106 262.8);

Tailwind

colors: {
  custom: {
    50: '#656e9c',
    500: '#1d3973',
    950: '#000000',
  },
}

SCSS

$custom: #1d3973;
$custom-light: #656e9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3973",
  "rgb": {
    "r": 29,
    "g": 57,
    "b": 115
  },
  "hsl": {
    "h": 220.465,
    "s": 59.722,
    "l": 28.235
  },
  "oklch": {
    "l": 0.35751,
    "c": 0.10565,
    "h": 262.8
  },
  "luminance": 0.04425
}

Semantic roles & 50–950 ramp

primary

#1D3973

secondary

#A78745

accent

#AF45E3

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #1D3973

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

Preview Lab → · Contrast checker → · Palette generator →