#1C178D#1C178D

#1C178D is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.2% C 0.181 H 271.6°. Best body text is #FFFFFF at 13.49:1 contrast (WCAG AA passes).

Color values

HEX	#1C178D
RGB	rgb(28, 23, 141)
HSL	hsl(243, 72%, 32%)
HSV	hsv(243, 84%, 55%)
CMYK	cmyk(80.1%, 83.7%, 0%, 44.7%)
CIE-LAB	lab(19.15, 42.95, -62.57)
CIE-LCH	lch(19.15, 75.90, 304.47°)
OKLab	oklab(32.19% 0.0049 -0.1811)
OKLCH	oklch(32.19% 0.181 271.6)
XYZ	xyz(5.5914, 2.7821, 25.4365)
Luminance	0.0278 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C178D #888D17

analogous

#174D8D #1C178D #57178D

triadic

#1C178D #8D1C17 #178D1C

tetradic

#1C178D #8D174D #888D17 #178D57

square

#1C178D #8D174D #888D17 #178D57

split-complementary

#1C178D #8D5717 #4D8D17

monochromatic

#070624 #120E58 #1C178D #2620C2 #463FE0

Accessibility & contrast

On white

13.49

#1C178D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1C178D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C178D

13.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C178D	#FFFFFF	#000000	##FFFFFF
##1C178D	1.00	13.49	1.56	13.49
#FFFFFF	13.49	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003490

Deuteranopia (green-blind)

#00288B

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1c178d;
/* rgb */ color: rgb(28, 23, 141);
/* oklch */ color: oklch(32.2% 0.181 271.6);

Tailwind

colors: {
  custom: {
    50: '#6f58b0',
    500: '#1c178d',
    950: '#000000',
  },
}

SCSS

$custom: #1c178d;
$custom-light: #6f58b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1c178d",
  "rgb": {
    "r": 28,
    "g": 23,
    "b": 141
  },
  "hsl": {
    "h": 242.542,
    "s": 71.951,
    "l": 32.157
  },
  "oklch": {
    "l": 0.32187,
    "c": 0.18116,
    "h": 271.6
  },
  "luminance": 0.02783
}

Semantic roles & 50–950 ramp

primary

#1C178D

secondary

#BAC040

accent

#EF39E7

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1C178D

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

Preview Lab → · Contrast checker → · Palette generator →