#1D43A4#1D43A4

#1D43A4 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.0% C 0.163 H 264.2°. Best body text is #FFFFFF at 8.78:1 contrast (WCAG AA passes).

Color values

HEX	#1D43A4
RGB	rgb(29, 67, 164)
HSL	hsl(223, 70%, 38%)
HSV	hsv(223, 82%, 64%)
CMYK	cmyk(82.3%, 59.1%, 0%, 35.7%)
CIE-LAB	lab(31.70, 24.06, -56.01)
CIE-LCH	lch(31.70, 60.96, 293.24°)
OKLab	oklab(42% -0.0164 -0.1619)
OKLCH	oklch(42% 0.163 264.2)
XYZ	xyz(9.2123, 6.9547, 35.9716)
Luminance	0.0696 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D43A4 #A47E1D

analogous

#1D86A4 #1D43A4 #3A1DA4

triadic

#1D43A4 #A41D43 #43A41D

tetradic

#1D43A4 #A41D86 #A47E1D #1DA43A

square

#1D43A4 #A41D86 #A47E1D #1DA43A

split-complementary

#1D43A4 #A43A1D #86A41D

monochromatic

#0B193C #142E70 #1D43A4 #2658D8 #5A80E2

Accessibility & contrast

On white

8.78

#1D43A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#1D43A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D43A4

8.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D43A4	#FFFFFF	#000000	##FFFFFF
##1D43A4	1.00	8.78	2.39	8.78
#FFFFFF	8.78	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A7

Deuteranopia (green-blind)

#0045A2

Tritanopia (blue-blind)

#005C6D

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1d43a4;
/* rgb */ color: rgb(29, 67, 164);
/* oklch */ color: oklch(42.0% 0.163 264.2);

Tailwind

colors: {
  custom: {
    50: '#7176c0',
    500: '#1d43a4',
    950: '#000000',
  },
}

SCSS

$custom: #1d43a4;
$custom-light: #7176c0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d43a4",
  "rgb": {
    "r": 29,
    "g": 67,
    "b": 164
  },
  "hsl": {
    "h": 223.111,
    "s": 69.948,
    "l": 37.843
  },
  "oklch": {
    "l": 0.42004,
    "c": 0.16274,
    "h": 264.2
  },
  "luminance": 0.06956
}

Semantic roles & 50–950 ramp

primary

#1D43A4

secondary

#C6A657

accent

#BB3BED

background

#F7F7FB

surface

#EDEDF7

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1D43A4

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

Preview Lab → · Contrast checker → · Palette generator →