#1C188B#1C188B

#1C188B is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.1% C 0.178 H 271.6°. Best body text is #FFFFFF at 13.52:1 contrast (WCAG AA passes).

Color values

HEX	#1C188B
RGB	rgb(28, 24, 139)
HSL	hsl(242, 71%, 32%)
HSV	hsv(242, 83%, 55%)
CMYK	cmyk(79.9%, 82.7%, 0%, 45.5%)
CIE-LAB	lab(19.07, 41.81, -61.45)
CIE-LCH	lch(19.07, 74.33, 304.23°)
OKLab	oklab(32.06% 0.0051 -0.1779)
OKLCH	oklch(32.06% 0.178 271.6)
XYZ	xyz(5.4642, 2.7636, 24.6665)
Luminance	0.0276 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C188B #878B18

analogous

#184E8B #1C188B #56188B

triadic

#1C188B #8B1C18 #188B1C

tetradic

#1C188B #8B184E #878B18 #188B56

square

#1C188B #8B184E #878B18 #188B56

split-complementary

#1C188B #8B5618 #4E8B18

monochromatic

#070623 #110F57 #1C188B #2721BF #453FDE

Accessibility & contrast

On white

13.52

#1C188B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1C188B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C188B

13.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C188B	#FFFFFF	#000000	##FFFFFF
##1C188B	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)

#00348E

Deuteranopia (green-blind)

#002889

Tritanopia (blue-blind)

#003C52

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1c188b;
/* rgb */ color: rgb(28, 24, 139);
/* oklch */ color: oklch(32.1% 0.178 271.6);

Tailwind

colors: {
  custom: {
    50: '#6e58ae',
    500: '#1c188b',
    950: '#000000',
  },
}

SCSS

$custom: #1c188b;
$custom-light: #6e58ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1c188b",
  "rgb": {
    "r": 28,
    "g": 24,
    "b": 139
  },
  "hsl": {
    "h": 242.087,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32061,
    "c": 0.17793,
    "h": 271.6
  },
  "luminance": 0.02764
}

Semantic roles & 50–950 ramp

primary

#1C188B

secondary

#BABE40

accent

#ED3AE7

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090310

muted

#7B787F

Preview Lab

Preview with #1C188B

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

Preview Lab → · Contrast checker → · Palette generator →