#1D43A8#1D43A8

#1D43A8 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.4% C 0.168 H 264.5°. Best body text is #FFFFFF at 8.68:1 contrast (WCAG AA passes).

Color values

HEX	#1D43A8
RGB	rgb(29, 67, 168)
HSL	hsl(224, 71%, 39%)
HSV	hsv(224, 83%, 66%)
CMYK	cmyk(82.7%, 60.1%, 0%, 34.1%)
CIE-LAB	lab(32.04, 25.63, -57.87)
CIE-LCH	lch(32.04, 63.29, 293.89°)
OKLab	oklab(42.36% -0.0162 -0.1674)
OKLCH	oklch(42.36% 0.168 264.5)
XYZ	xyz(9.5792, 7.1015, 37.9041)
Luminance	0.0710 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D43A8 #A8821D

analogous

#1D88A8 #1D43A8 #3C1DA8

triadic

#1D43A8 #A81D43 #43A81D

tetradic

#1D43A8 #A81D88 #A8821D #1DA83C

square

#1D43A8 #A81D88 #A8821D #1DA83C

split-complementary

#1D43A8 #A83C1D #88A81D

monochromatic

#0B1940 #142E74 #1D43A8 #2859DA #5C81E3

Accessibility & contrast

On white

8.68

#1D43A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#1D43A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D43A8

8.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D43A8	#FFFFFF	#000000	##FFFFFF
##1D43A8	1.00	8.68	2.42	8.68
#FFFFFF	8.68	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052AB

Deuteranopia (green-blind)

#0045A6

Tritanopia (blue-blind)

#005D6F

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1d43a8;
/* rgb */ color: rgb(29, 67, 168);
/* oklch */ color: oklch(42.4% 0.168 264.5);

Tailwind

colors: {
  custom: {
    50: '#7276c3',
    500: '#1d43a8',
    950: '#000000',
  },
}

SCSS

$custom: #1d43a8;
$custom-light: #7276c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1d43a8",
  "rgb": {
    "r": 29,
    "g": 67,
    "b": 168
  },
  "hsl": {
    "h": 223.597,
    "s": 70.558,
    "l": 38.627
  },
  "oklch": {
    "l": 0.42357,
    "c": 0.16815,
    "h": 264.5
  },
  "luminance": 0.07103
}

Semantic roles & 50–950 ramp

primary

#1D43A8

secondary

#C7A95A

accent

#BC3AED

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090813

muted

#7B7B82

Preview Lab

Preview with #1D43A8

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

Preview Lab → · Contrast checker → · Palette generator →