#1D3C99#1D3C99

#1D3C99 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.6% C 0.156 H 265.5°. Best body text is #FFFFFF at 9.73:1 contrast (WCAG AA passes).

Color values

HEX	#1D3C99
RGB	rgb(29, 60, 153)
HSL	hsl(225, 68%, 36%)
HSV	hsv(225, 81%, 60%)
CMYK	cmyk(81%, 60.8%, 0%, 40%)
CIE-LAB	lab(28.88, 24.48, -53.96)
CIE-LCH	lch(28.88, 59.25, 294.40°)
OKLab	oklab(39.61% -0.0123 -0.156)
OKLCH	oklch(39.61% 0.156 265.5)
XYZ	xyz(7.8703, 5.7919, 30.8340)
Luminance	0.0579 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3C99 #997A1D

analogous

#1D7A99 #1D3C99 #3C1D99

triadic

#1D3C99 #991D3C #3C991D

tetradic

#1D3C99 #991D7A #997A1D #1D993C

square

#1D3C99 #991D7A #997A1D #1D993C

split-complementary

#1D3C99 #993C1D #7A991D

monochromatic

#091432 #132866 #1D3C99 #2750CC #5275DE

Accessibility & contrast

On white

9.73

#1D3C99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#1D3C99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3C99

9.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3C99	#FFFFFF	#000000	##FFFFFF
##1D3C99	1.00	9.73	2.16	9.73
#FFFFFF	9.73	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9C

Deuteranopia (green-blind)

#003E97

Tritanopia (blue-blind)

#005464

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1d3c99;
/* rgb */ color: rgb(29, 60, 153);
/* oklch */ color: oklch(39.6% 0.156 265.5);

Tailwind

colors: {
  custom: {
    50: '#6f71b8',
    500: '#1d3c99',
    950: '#000000',
  },
}

SCSS

$custom: #1d3c99;
$custom-light: #6f71b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3c99",
  "rgb": {
    "r": 29,
    "g": 60,
    "b": 153
  },
  "hsl": {
    "h": 225,
    "s": 68.132,
    "l": 35.686
  },
  "oklch": {
    "l": 0.39605,
    "c": 0.15647,
    "h": 265.5
  },
  "luminance": 0.05793
}

Semantic roles & 50–950 ramp

primary

#1D3C99

secondary

#C1A551

accent

#BF3DEB

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #1D3C99

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

Preview Lab → · Contrast checker → · Palette generator →