#1D3D78#1D3D78

#1D3D78 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.1% C 0.108 H 261.4°. Best body text is #FFFFFF at 10.55:1 contrast (WCAG AA passes).

Color values

HEX	#1D3D78
RGB	rgb(29, 61, 120)
HSL	hsl(219, 61%, 29%)
HSV	hsv(219, 76%, 47%)
CMYK	cmyk(75.8%, 49.2%, 0%, 52.9%)
CIE-LAB	lab(26.60, 10.51, -37.18)
CIE-LCH	lch(26.60, 38.63, 285.79°)
OKLab	oklab(37.07% -0.0162 -0.1066)
OKLCH	oklch(37.07% 0.108 261.4)
XYZ	xyz(5.5644, 4.9542, 18.4287)
Luminance	0.0495 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3D78 #78581D

analogous

#1D6B78 #1D3D78 #2B1D78

triadic

#1D3D78 #781D3D #3D781D

tetradic

#1D3D78 #781D6B #78581D #1D782B

square

#1D3D78 #781D6B #78581D #1D782B

split-complementary

#1D3D78 #782B1D #6B781D

monochromatic

#060D19 #112447 #1D3D78 #2956A9 #3F72D1

Accessibility & contrast

On white

10.55

#1D3D78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#1D3D78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3D78

10.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3D78	#FFFFFF	#000000	##FFFFFF
##1D3D78	1.00	10.55	1.99	10.55
#FFFFFF	10.55	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D437A

Deuteranopia (green-blind)

#063B77

Tritanopia (blue-blind)

#004B54

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1d3d78;
/* rgb */ color: rgb(29, 61, 120);
/* oklch */ color: oklch(37.1% 0.108 261.4);

Tailwind

colors: {
  custom: {
    50: '#66729f',
    500: '#1d3d78',
    950: '#000000',
  },
}

SCSS

$custom: #1d3d78;
$custom-light: #66729f;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3d78",
  "rgb": {
    "r": 29,
    "g": 61,
    "b": 120
  },
  "hsl": {
    "h": 218.901,
    "s": 61.074,
    "l": 29.216
  },
  "oklch": {
    "l": 0.37072,
    "c": 0.10785,
    "h": 261.4
  },
  "luminance": 0.04955
}

Semantic roles & 50–950 ramp

primary

#1D3D78

secondary

#AC8845

accent

#AC44E4

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #1D3D78

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

Preview Lab → · Contrast checker → · Palette generator →