#1D3871#1D3871

#1D3871 is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.4% C 0.104 H 263.1°. Best body text is #FFFFFF at 11.31:1 contrast (WCAG AA passes).

Color values

HEX	#1D3871
RGB	rgb(29, 56, 113)
HSL	hsl(221, 59%, 28%)
HSV	hsv(221, 74%, 44%)
CMYK	cmyk(74.3%, 50.4%, 0%, 55.7%)
CIE-LAB	lab(24.58, 11.18, -35.98)
CIE-LCH	lch(24.58, 37.68, 287.26°)
OKLab	oklab(35.36% -0.0125 -0.1032)
OKLCH	oklch(35.36% 0.104 263.1)
XYZ	xyz(4.9004, 4.2813, 16.1877)
Luminance	0.0428 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3871 #71561D

analogous

#1D6271 #1D3871 #2C1D71

triadic

#1D3871 #711D38 #38711D

tetradic

#1D3871 #711D62 #71561D #1D712C

square

#1D3871 #711D62 #71561D #1D712C

split-complementary

#1D3871 #712C1D #62711D

monochromatic

#060C18 #112040 #1D3871 #2950A2 #3C6ACD

Accessibility & contrast

On white

11.31

#1D3871 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1D3871 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3871

11.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3871	#FFFFFF	#000000	##FFFFFF
##1D3871	1.00	11.31	1.86	11.31
#FFFFFF	11.31	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#193E73

Deuteranopia (green-blind)

#033770

Tritanopia (blue-blind)

#00454F

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1d3871;
/* rgb */ color: rgb(29, 56, 113);
/* oklch */ color: oklch(35.4% 0.104 263.1);

Tailwind

colors: {
  custom: {
    50: '#656e9a',
    500: '#1d3871',
    950: '#000000',
  },
}

SCSS

$custom: #1d3871;
$custom-light: #656e9a;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3871",
  "rgb": {
    "r": 29,
    "g": 56,
    "b": 113
  },
  "hsl": {
    "h": 220.714,
    "s": 59.155,
    "l": 27.843
  },
  "oklch": {
    "l": 0.35363,
    "c": 0.10398,
    "h": 263.1
  },
  "luminance": 0.04282
}

Semantic roles & 50–950 ramp

primary

#1D3871

secondary

#A58644

accent

#B045E2

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #1D3871

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

Preview Lab → · Contrast checker → · Palette generator →