#1D178C#1D178C

#1D178C is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.1% C 0.180 H 272.0°. Best body text is #FFFFFF at 13.52:1 contrast (WCAG AA passes).

Color values

HEX	#1D178C
RGB	rgb(29, 23, 140)
HSL	hsl(243, 72%, 32%)
HSV	hsv(243, 84%, 55%)
CMYK	cmyk(79.3%, 83.6%, 0%, 45.1%)
CIE-LAB	lab(19.08, 42.70, -62.06)
CIE-LCH	lch(19.08, 75.32, 304.53°)
OKLab	oklab(32.12% 0.0064 -0.1796)
OKLCH	oklch(32.12% 0.18 272)
XYZ	xyz(5.5451, 2.7668, 25.0477)
Luminance	0.0277 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D178C #868C17

analogous

#174C8C #1D178C #58178C

triadic

#1D178C #8C1D17 #178C1D

tetradic

#1D178C #8C174C #868C17 #178C58

square

#1D178C #8C174C #868C17 #178C58

split-complementary

#1D178C #8C5817 #4C8C17

monochromatic

#070623 #120E57 #1D178C #2820C1 #463EDF

Accessibility & contrast

On white

13.52

#1D178C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1D178C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D178C

13.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D178C	#FFFFFF	#000000	##FFFFFF
##1D178C	1.00	13.52	1.55	13.52
#FFFFFF	13.52	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00348F

Deuteranopia (green-blind)

#00288A

Tritanopia (blue-blind)

#003C53

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1d178c;
/* rgb */ color: rgb(29, 23, 140);
/* oklch */ color: oklch(32.1% 0.180 272.0);

Tailwind

colors: {
  custom: {
    50: '#6f58af',
    500: '#1d178c',
    950: '#000000',
  },
}

SCSS

$custom: #1d178c;
$custom-light: #6f58af;
$custom-dark: #000000;

JSON

{
  "hex": "#1d178c",
  "rgb": {
    "r": 29,
    "g": 23,
    "b": 140
  },
  "hsl": {
    "h": 243.077,
    "s": 71.779,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32123,
    "c": 0.17968,
    "h": 272
  },
  "luminance": 0.02767
}

Semantic roles & 50–950 ramp

primary

#1D178C

secondary

#B9BF3F

accent

#EF39E5

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090311

muted

#7B7880

Preview Lab

Preview with #1D178C

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

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