#1D3D8C#1D3D8C

#1D3D8C is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.7% C 0.137 H 264.3°. Best body text is #FFFFFF at 10.01:1 contrast (WCAG AA passes).

Color values

HEX	#1D3D8C
RGB	rgb(29, 61, 140)
HSL	hsl(223, 66%, 33%)
HSV	hsv(223, 79%, 55%)
CMYK	cmyk(79.3%, 56.4%, 0%, 45.1%)
CIE-LAB	lab(28.09, 18.61, -47.26)
CIE-LCH	lch(28.09, 50.79, 291.49°)
OKLab	oklab(38.68% -0.0137 -0.1363)
OKLCH	oklch(38.68% 0.137 264.3)
XYZ	xyz(6.9074, 5.4914, 25.5018)
Luminance	0.0549 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3D8C #8C6C1D

analogous

#1D748C #1D3D8C #351D8C

triadic

#1D3D8C #8C1D3D #3D8C1D

tetradic

#1D3D8C #8C1D74 #8C6C1D #1D8C35

square

#1D3D8C #8C1D74 #8C6C1D #1D8C35

split-complementary

#1D3D8C #8C351D #748C1D

monochromatic

#081127 #122759 #1D3D8C #2853BF #4A73D9

Accessibility & contrast

On white

10.01

#1D3D8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#1D3D8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3D8C

10.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3D8C	#FFFFFF	#000000	##FFFFFF
##1D3D8C	1.00	10.01	2.10	10.01
#FFFFFF	10.01	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488F

Deuteranopia (green-blind)

#003D8A

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1d3d8c;
/* rgb */ color: rgb(29, 61, 140);
/* oklch */ color: oklch(38.7% 0.137 264.3);

Tailwind

colors: {
  custom: {
    50: '#6b72ae',
    500: '#1d3d8c',
    950: '#000000',
  },
}

SCSS

$custom: #1d3d8c;
$custom-light: #6b72ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3d8c",
  "rgb": {
    "r": 29,
    "g": 61,
    "b": 140
  },
  "hsl": {
    "h": 222.703,
    "s": 65.68,
    "l": 33.137
  },
  "oklch": {
    "l": 0.38677,
    "c": 0.137,
    "h": 264.3
  },
  "luminance": 0.05492
}

Semantic roles & 50–950 ramp

primary

#1D3D8C

secondary

#BC9B49

accent

#B83FE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D3D8C

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

Preview Lab → · Contrast checker → · Palette generator →