#1D3587#1D3587

#1D3587 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.5% C 0.140 H 266.7°. Best body text is #FFFFFF at 10.99:1 contrast (WCAG AA passes).

Color values

HEX	#1D3587
RGB	rgb(29, 53, 135)
HSL	hsl(226, 65%, 32%)
HSV	hsv(226, 79%, 53%)
CMYK	cmyk(78.5%, 60.7%, 0%, 47.1%)
CIE-LAB	lab(25.43, 22.17, -48.49)
CIE-LCH	lch(25.43, 53.32, 294.57°)
OKLab	oklab(36.55% -0.008 -0.14)
OKLCH	oklch(36.55% 0.14 266.7)
XYZ	xyz(6.1514, 4.5560, 23.4722)
Luminance	0.0456 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3587 #876F1D

analogous

#1D6A87 #1D3587 #3A1D87

triadic

#1D3587 #871D35 #35871D

tetradic

#1D3587 #871D6A #876F1D #1D873A

square

#1D3587 #871D6A #876F1D #1D873A

split-complementary

#1D3587 #873A1D #6A871D

monochromatic

#070D22 #122155 #1D3587 #2849B9 #4768D7

Accessibility & contrast

On white

10.99

#1D3587 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#1D3587 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3587

10.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3587	#FFFFFF	#000000	##FFFFFF
##1D3587	1.00	10.99	1.91	10.99
#FFFFFF	10.99	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00418A

Deuteranopia (green-blind)

#003785

Tritanopia (blue-blind)

#004A58

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1d3587;
/* rgb */ color: rgb(29, 53, 135);
/* oklch */ color: oklch(36.5% 0.140 266.7);

Tailwind

colors: {
  custom: {
    50: '#6b6bab',
    500: '#1d3587',
    950: '#000000',
  },
}

SCSS

$custom: #1d3587;
$custom-light: #6b6bab;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3587",
  "rgb": {
    "r": 29,
    "g": 53,
    "b": 135
  },
  "hsl": {
    "h": 226.415,
    "s": 64.634,
    "l": 32.157
  },
  "oklch": {
    "l": 0.3655,
    "c": 0.14028,
    "h": 266.7
  },
  "luminance": 0.04557
}

Semantic roles & 50–950 ramp

primary

#1D3587

secondary

#B99F46

accent

#C240E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1D3587

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

Preview Lab → · Contrast checker → · Palette generator →