#1D3574#1D3574

#1D3574 is a dark, moderate blue. Relative luminance 0.041; OKLCH L 34.9% C 0.113 H 265.3°. Best body text is #FFFFFF at 11.58:1 contrast (WCAG AA passes).

Color values

HEX	#1D3574
RGB	rgb(29, 53, 116)
HSL	hsl(223, 60%, 28%)
HSV	hsv(223, 75%, 45%)
CMYK	cmyk(75%, 54.3%, 0%, 54.5%)
CIE-LAB	lab(23.89, 14.52, -39.01)
CIE-LCH	lch(23.89, 41.62, 290.42°)
OKLab	oklab(34.91% -0.0093 -0.1122)
OKLCH	oklch(34.91% 0.113 265.3)
XYZ	xyz(4.9311, 4.0679, 17.0449)
Luminance	0.0407 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3574 #745C1D

analogous

#1D6074 #1D3574 #301D74

triadic

#1D3574 #741D35 #35741D

tetradic

#1D3574 #741D60 #745C1D #1D7430

square

#1D3574 #741D60 #745C1D #1D7430

split-complementary

#1D3574 #74301D #60741D

monochromatic

#060B18 #111F43 #1D3574 #294BA5 #3D65CE

Accessibility & contrast

On white

11.58

#1D3574 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1D3574 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3574

11.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3574	#FFFFFF	#000000	##FFFFFF
##1D3574	1.00	11.58	1.81	11.58
#FFFFFF	11.58	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C3D76

Deuteranopia (green-blind)

#003573

Tritanopia (blue-blind)

#00444F

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1d3574;
/* rgb */ color: rgb(29, 53, 116);
/* oklch */ color: oklch(34.9% 0.113 265.3);

Tailwind

colors: {
  custom: {
    50: '#666b9c',
    500: '#1d3574',
    950: '#000000',
  },
}

SCSS

$custom: #1d3574;
$custom-light: #666b9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3574",
  "rgb": {
    "r": 29,
    "g": 53,
    "b": 116
  },
  "hsl": {
    "h": 223.448,
    "s": 60,
    "l": 28.431
  },
  "oklch": {
    "l": 0.3491,
    "c": 0.11255,
    "h": 265.3
  },
  "luminance": 0.04068
}

Semantic roles & 50–950 ramp

primary

#1D3574

secondary

#A88D45

accent

#B745E3

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1D3574

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

Preview Lab → · Contrast checker → · Palette generator →