#1D43A7#1D43A7

#1D43A7 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.3% C 0.167 H 264.4°. Best body text is #FFFFFF at 8.70:1 contrast (WCAG AA passes).

Color values

HEX	#1D43A7
RGB	rgb(29, 67, 167)
HSL	hsl(223, 70%, 38%)
HSV	hsv(223, 83%, 65%)
CMYK	cmyk(82.6%, 59.9%, 0%, 34.5%)
CIE-LAB	lab(31.95, 25.24, -57.41)
CIE-LCH	lch(31.95, 62.71, 293.73°)
OKLab	oklab(42.27% -0.0163 -0.166)
OKLCH	oklch(42.27% 0.167 264.4)
XYZ	xyz(9.4864, 7.0644, 37.4153)
Luminance	0.0707 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D43A7 #A7811D

analogous

#1D88A7 #1D43A7 #3C1DA7

triadic

#1D43A7 #A71D43 #43A71D

tetradic

#1D43A7 #A71D88 #A7811D #1DA73C

square

#1D43A7 #A71D88 #A7811D #1DA73C

split-complementary

#1D43A7 #A73C1D #88A71D

monochromatic

#0B193F #142E73 #1D43A7 #2859DA #5C81E3

Accessibility & contrast

On white

8.70

#1D43A7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#1D43A7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D43A7

8.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D43A7	#FFFFFF	#000000	##FFFFFF
##1D43A7	1.00	8.70	2.41	8.70
#FFFFFF	8.70	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052AA

Deuteranopia (green-blind)

#0045A5

Tritanopia (blue-blind)

#005D6E

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1d43a7;
/* rgb */ color: rgb(29, 67, 167);
/* oklch */ color: oklch(42.3% 0.167 264.4);

Tailwind

colors: {
  custom: {
    50: '#7276c2',
    500: '#1d43a7',
    950: '#000000',
  },
}

SCSS

$custom: #1d43a7;
$custom-light: #7276c2;
$custom-dark: #000000;

JSON

{
  "hex": "#1d43a7",
  "rgb": {
    "r": 29,
    "g": 67,
    "b": 167
  },
  "hsl": {
    "h": 223.478,
    "s": 70.408,
    "l": 38.431
  },
  "oklch": {
    "l": 0.42268,
    "c": 0.1668,
    "h": 264.4
  },
  "luminance": 0.07066
}

Semantic roles & 50–950 ramp

primary

#1D43A7

secondary

#C7A859

accent

#BC3BED

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1D43A7

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

Preview Lab → · Contrast checker → · Palette generator →