#1D4583#1D4583

#1D4583 is a dark, moderate blue. Relative luminance 0.062; OKLCH L 39.8% C 0.114 H 259.0°. Best body text is #FFFFFF at 9.41:1 contrast (WCAG AA passes).

Color values

HEX	#1D4583
RGB	rgb(29, 69, 131)
HSL	hsl(216, 64%, 31%)
HSV	hsv(216, 78%, 51%)
CMYK	cmyk(77.9%, 47.3%, 0%, 48.6%)
CIE-LAB	lab(29.80, 9.44, -38.93)
CIE-LCH	lch(29.80, 40.05, 283.63°)
OKLab	oklab(39.77% -0.0216 -0.1116)
OKLCH	oklch(39.77% 0.114 259)
XYZ	xyz(6.7301, 6.1554, 22.3017)
Luminance	0.0616 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D4583 #835B1D

analogous

#1D7883 #1D4583 #281D83

triadic

#1D4583 #831D45 #45831D

tetradic

#1D4583 #831D78 #835B1D #1D8328

square

#1D4583 #831D78 #835B1D #1D8328

split-complementary

#1D4583 #83281D #78831D

monochromatic

#07101F #122B51 #1D4583 #285FB5 #457ED6

Accessibility & contrast

On white

9.41

#1D4583 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#1D4583 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D4583

9.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D4583	#FFFFFF	#000000	##FFFFFF
##1D4583	1.00	9.41	2.23	9.41
#FFFFFF	9.41	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244B85

Deuteranopia (green-blind)

#0D4282

Tritanopia (blue-blind)

#00545D

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1d4583;
/* rgb */ color: rgb(29, 69, 131);
/* oklch */ color: oklch(39.8% 0.114 259.0);

Tailwind

colors: {
  custom: {
    50: '#6978a7',
    500: '#1d4583',
    950: '#000000',
  },
}

SCSS

$custom: #1d4583;
$custom-light: #6978a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1d4583",
  "rgb": {
    "r": 29,
    "g": 69,
    "b": 131
  },
  "hsl": {
    "h": 216.471,
    "s": 63.75,
    "l": 31.373
  },
  "oklch": {
    "l": 0.39773,
    "c": 0.11369,
    "h": 259
  },
  "luminance": 0.06156
}

Semantic roles & 50–950 ramp

primary

#1D4583

secondary

#B68A46

accent

#A641E7

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1D4583

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

Preview Lab → · Contrast checker → · Palette generator →