#1D3A78#1D3A78

#1D3A78 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.4% C 0.112 H 263.1°. Best body text is #FFFFFF at 10.89:1 contrast (WCAG AA passes).

Color values

HEX	#1D3A78
RGB	rgb(29, 58, 120)
HSL	hsl(221, 61%, 29%)
HSV	hsv(221, 76%, 47%)
CMYK	cmyk(75.8%, 51.7%, 0%, 52.9%)
CIE-LAB	lab(25.69, 12.61, -38.64)
CIE-LCH	lch(25.69, 40.65, 288.08°)
OKLab	oklab(36.37% -0.0134 -0.111)
OKLCH	oklch(36.37% 0.112 263.1)
XYZ	xyz(5.4087, 4.6428, 18.3768)
Luminance	0.0464 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3A78 #785B1D

analogous

#1D6878 #1D3A78 #2E1D78

triadic

#1D3A78 #781D3A #3A781D

tetradic

#1D3A78 #781D68 #785B1D #1D782E

square

#1D3A78 #781D68 #785B1D #1D782E

split-complementary

#1D3A78 #782E1D #68781D

monochromatic

#060C19 #112247 #1D3A78 #2952A9 #3F6DD1

Accessibility & contrast

On white

10.89

#1D3A78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1D3A78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3A78

10.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3A78	#FFFFFF	#000000	##FFFFFF
##1D3A78	1.00	10.89	1.93	10.89
#FFFFFF	10.89	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16417A

Deuteranopia (green-blind)

#003977

Tritanopia (blue-blind)

#004953

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1d3a78;
/* rgb */ color: rgb(29, 58, 120);
/* oklch */ color: oklch(36.4% 0.112 263.1);

Tailwind

colors: {
  custom: {
    50: '#676f9f',
    500: '#1d3a78',
    950: '#000000',
  },
}

SCSS

$custom: #1d3a78;
$custom-light: #676f9f;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3a78",
  "rgb": {
    "r": 29,
    "g": 58,
    "b": 120
  },
  "hsl": {
    "h": 220.879,
    "s": 61.074,
    "l": 29.216
  },
  "oklch": {
    "l": 0.36373,
    "c": 0.11181,
    "h": 263.1
  },
  "luminance": 0.04643
}

Semantic roles & 50–950 ramp

primary

#1D3A78

secondary

#AC8B45

accent

#B144E4

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #1D3A78

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

Preview Lab → · Contrast checker → · Palette generator →