#1D3580#1D3580

#1D3580 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 35.9% C 0.130 H 266.3°. Best body text is #FFFFFF at 11.21:1 contrast (WCAG AA passes).

Color values

HEX	#1D3580
RGB	rgb(29, 53, 128)
HSL	hsl(225, 63%, 31%)
HSV	hsv(225, 77%, 50%)
CMYK	cmyk(77.3%, 58.6%, 0%, 49.8%)
CIE-LAB	lab(24.84, 19.37, -45.06)
CIE-LCH	lch(24.84, 49.05, 293.26°)
OKLab	oklab(35.93% -0.0083 -0.13)
OKLCH	oklch(35.93% 0.13 266.3)
XYZ	xyz(5.6747, 4.3653, 20.9614)
Luminance	0.0437 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3580 #80681D

analogous

#1D6680 #1D3580 #371D80

triadic

#1D3580 #801D35 #35801D

tetradic

#1D3580 #801D66 #80681D #1D8037

square

#1D3580 #801D66 #80681D #1D8037

split-complementary

#1D3580 #80371D #66801D

monochromatic

#060C1C #12204E #1D3580 #284AB2 #4366D4

Accessibility & contrast

On white

11.21

#1D3580 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1D3580 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3580

11.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3580	#FFFFFF	#000000	##FFFFFF
##1D3580	1.00	11.21	1.87	11.21
#FFFFFF	11.21	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004083

Deuteranopia (green-blind)

#00377F

Tritanopia (blue-blind)

#004855

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1d3580;
/* rgb */ color: rgb(29, 53, 128);
/* oklch */ color: oklch(35.9% 0.130 266.3);

Tailwind

colors: {
  custom: {
    50: '#696ba5',
    500: '#1d3580',
    950: '#000000',
  },
}

SCSS

$custom: #1d3580;
$custom-light: #696ba5;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3580",
  "rgb": {
    "r": 29,
    "g": 53,
    "b": 128
  },
  "hsl": {
    "h": 225.455,
    "s": 63.057,
    "l": 30.784
  },
  "oklch": {
    "l": 0.35927,
    "c": 0.13025,
    "h": 266.3
  },
  "luminance": 0.04366
}

Semantic roles & 50–950 ramp

primary

#1D3580

secondary

#B39945

accent

#BE42E6

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1D3580

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

Preview Lab → · Contrast checker → · Palette generator →