#1D178D#1D178D

#1D178D is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.2% C 0.181 H 271.9°. Best body text is #FFFFFF at 13.47:1 contrast (WCAG AA passes).

Color values

HEX	#1D178D
RGB	rgb(29, 23, 141)
HSL	hsl(243, 72%, 32%)
HSV	hsv(243, 84%, 55%)
CMYK	cmyk(79.4%, 83.7%, 0%, 44.7%)
CIE-LAB	lab(19.21, 43.02, -62.47)
CIE-LCH	lch(19.21, 75.85, 304.55°)
OKLab	oklab(32.25% 0.0061 -0.1808)
OKLCH	oklch(32.25% 0.181 271.9)
XYZ	xyz(5.6192, 2.7965, 25.4378)
Luminance	0.0280 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D178D #878D17

analogous

#174C8D #1D178D #58178D

triadic

#1D178D #8D1D17 #178D1D

tetradic

#1D178D #8D174C #878D17 #178D58

square

#1D178D #8D174C #878D17 #178D58

split-complementary

#1D178D #8D5817 #4C8D17

monochromatic

#070624 #120E58 #1D178D #2820C2 #473FE0

Accessibility & contrast

On white

13.47

#1D178D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1D178D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D178D

13.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D178D	#FFFFFF	#000000	##FFFFFF
##1D178D	1.00	13.47	1.56	13.47
#FFFFFF	13.47	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003490

Deuteranopia (green-blind)

#00298B

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1d178d;
/* rgb */ color: rgb(29, 23, 141);
/* oklch */ color: oklch(32.2% 0.181 271.9);

Tailwind

colors: {
  custom: {
    50: '#6f58b0',
    500: '#1d178d',
    950: '#000000',
  },
}

SCSS

$custom: #1d178d;
$custom-light: #6f58b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d178d",
  "rgb": {
    "r": 29,
    "g": 23,
    "b": 141
  },
  "hsl": {
    "h": 243.051,
    "s": 71.951,
    "l": 32.157
  },
  "oklch": {
    "l": 0.32245,
    "c": 0.18088,
    "h": 271.9
  },
  "luminance": 0.02797
}

Semantic roles & 50–950 ramp

primary

#1D178D

secondary

#B9C040

accent

#EF39E5

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1D178D

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

Preview Lab → · Contrast checker → · Palette generator →