#1D3589#1D3589

#1D3589 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.7% C 0.143 H 266.8°. Best body text is #FFFFFF at 10.92:1 contrast (WCAG AA passes).

Color values

HEX	#1D3589
RGB	rgb(29, 53, 137)
HSL	hsl(227, 65%, 33%)
HSV	hsv(227, 79%, 54%)
CMYK	cmyk(78.8%, 61.3%, 0%, 46.3%)
CIE-LAB	lab(25.60, 22.96, -49.45)
CIE-LCH	lch(25.60, 54.53, 294.91°)
OKLab	oklab(36.73% -0.008 -0.1429)
OKLCH	oklch(36.73% 0.143 266.8)
XYZ	xyz(6.2936, 4.6129, 24.2207)
Luminance	0.0461 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3589 #89711D

analogous

#1D6B89 #1D3589 #3B1D89

triadic

#1D3589 #891D35 #35891D

tetradic

#1D3589 #891D6B #89711D #1D893B

square

#1D3589 #891D6B #89711D #1D893B

split-complementary

#1D3589 #893B1D #6B891D

monochromatic

#080E24 #122156 #1D3589 #2849BC #4868D8

Accessibility & contrast

On white

10.92

#1D3589 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1D3589 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3589

10.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3589	#FFFFFF	#000000	##FFFFFF
##1D3589	1.00	10.92	1.92	10.92
#FFFFFF	10.92	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428C

Deuteranopia (green-blind)

#003887

Tritanopia (blue-blind)

#004A59

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1d3589;
/* rgb */ color: rgb(29, 53, 137);
/* oklch */ color: oklch(36.7% 0.143 266.8);

Tailwind

colors: {
  custom: {
    50: '#6b6bac',
    500: '#1d3589',
    950: '#000000',
  },
}

SCSS

$custom: #1d3589;
$custom-light: #6b6bac;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3589",
  "rgb": {
    "r": 29,
    "g": 53,
    "b": 137
  },
  "hsl": {
    "h": 226.667,
    "s": 65.06,
    "l": 32.549
  },
  "oklch": {
    "l": 0.36731,
    "c": 0.1431,
    "h": 266.8
  },
  "luminance": 0.04614
}

Semantic roles & 50–950 ramp

primary

#1D3589

secondary

#BAA147

accent

#C340E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1D3589

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

Preview Lab → · Contrast checker → · Palette generator →