#1D43A6#1D43A6

#1D43A6 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.2% C 0.165 H 264.3°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#1D43A6
RGB	rgb(29, 67, 166)
HSL	hsl(223, 70%, 38%)
HSV	hsv(223, 83%, 65%)
CMYK	cmyk(82.5%, 59.6%, 0%, 34.9%)
CIE-LAB	lab(31.87, 24.84, -56.94)
CIE-LCH	lch(31.87, 62.13, 293.57°)
OKLab	oklab(42.18% -0.0163 -0.1646)
OKLCH	oklch(42.18% 0.165 264.3)
XYZ	xyz(9.3943, 7.0276, 36.9303)
Luminance	0.0703 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D43A6 #A6801D

analogous

#1D87A6 #1D43A6 #3C1DA6

triadic

#1D43A6 #A61D43 #43A61D

tetradic

#1D43A6 #A61D87 #A6801D #1DA63C

square

#1D43A6 #A61D87 #A6801D #1DA63C

split-complementary

#1D43A6 #A63C1D #87A61D

monochromatic

#0B193E #142E72 #1D43A6 #2758D9 #5B81E2

Accessibility & contrast

On white

8.73

#1D43A6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#1D43A6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D43A6

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D43A6	#FFFFFF	#000000	##FFFFFF
##1D43A6	1.00	8.73	2.41	8.73
#FFFFFF	8.73	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052A9

Deuteranopia (green-blind)

#0045A4

Tritanopia (blue-blind)

#005C6E

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1d43a6;
/* rgb */ color: rgb(29, 67, 166);
/* oklch */ color: oklch(42.2% 0.165 264.3);

Tailwind

colors: {
  custom: {
    50: '#7276c1',
    500: '#1d43a6',
    950: '#000000',
  },
}

SCSS

$custom: #1d43a6;
$custom-light: #7276c1;
$custom-dark: #000000;

JSON

{
  "hex": "#1d43a6",
  "rgb": {
    "r": 29,
    "g": 67,
    "b": 166
  },
  "hsl": {
    "h": 223.358,
    "s": 70.256,
    "l": 38.235
  },
  "oklch": {
    "l": 0.4218,
    "c": 0.16545,
    "h": 264.3
  },
  "luminance": 0.07029
}

Semantic roles & 50–950 ramp

primary

#1D43A6

secondary

#C6A859

accent

#BC3BED

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1D43A6

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

Preview Lab → · Contrast checker → · Palette generator →