#1C178E#1C178E

#1C178E is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.3% C 0.182 H 271.5°. Best body text is #FFFFFF at 13.44:1 contrast (WCAG AA passes).

Color values

HEX	#1C178E
RGB	rgb(28, 23, 142)
HSL	hsl(243, 72%, 32%)
HSV	hsv(243, 84%, 56%)
CMYK	cmyk(80.3%, 83.8%, 0%, 44.3%)
CIE-LAB	lab(19.27, 43.28, -62.99)
CIE-LCH	lch(19.27, 76.42, 304.49°)
OKLab	oklab(32.31% 0.0047 -0.1823)
OKLCH	oklch(32.31% 0.182 271.5)
XYZ	xyz(5.6661, 2.8120, 25.8301)
Luminance	0.0281 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C178E #898E17

analogous

#174E8E #1C178E #58178E

triadic

#1C178E #8E1C17 #178E1C

tetradic

#1C178E #8E174E #898E17 #178E58

square

#1C178E #8E174E #898E17 #178E58

split-complementary

#1C178E #8E5817 #4E8E17

monochromatic

#070625 #120E59 #1C178E #2620C3 #463FE0

Accessibility & contrast

On white

13.44

#1C178E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1C178E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C178E

13.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C178E	#FFFFFF	#000000	##FFFFFF
##1C178E	1.00	13.44	1.56	13.44
#FFFFFF	13.44	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003491

Deuteranopia (green-blind)

#00298C

Tritanopia (blue-blind)

#003D54

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1c178e;
/* rgb */ color: rgb(28, 23, 142);
/* oklch */ color: oklch(32.3% 0.182 271.5);

Tailwind

colors: {
  custom: {
    50: '#6f58b0',
    500: '#1c178e',
    950: '#000000',
  },
}

SCSS

$custom: #1c178e;
$custom-light: #6f58b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1c178e",
  "rgb": {
    "r": 28,
    "g": 23,
    "b": 142
  },
  "hsl": {
    "h": 242.521,
    "s": 72.121,
    "l": 32.353
  },
  "oklch": {
    "l": 0.3231,
    "c": 0.18235,
    "h": 271.5
  },
  "luminance": 0.02813
}

Semantic roles & 50–950 ramp

primary

#1C178E

secondary

#BBC040

accent

#EF39E7

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1C178E

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

Preview Lab → · Contrast checker → · Palette generator →