#1B188C#1B188C

#1B188C is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.1% C 0.179 H 271.2°. Best body text is #FFFFFF at 13.50:1 contrast (WCAG AA passes).

Color values

HEX	#1B188C
RGB	rgb(27, 24, 140)
HSL	hsl(242, 71%, 32%)
HSV	hsv(242, 83%, 55%)
CMYK	cmyk(80.7%, 82.9%, 0%, 45.1%)
CIE-LAB	lab(19.14, 42.07, -61.97)
CIE-LCH	lch(19.14, 74.90, 304.17°)
OKLab	oklab(32.13% 0.0037 -0.1794)
OKLCH	oklch(32.13% 0.179 271.2)
XYZ	xyz(5.5107, 2.7791, 25.0518)
Luminance	0.0278 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B188C #898C18

analogous

#184F8C #1B188C #55188C

triadic

#1B188C #8C1B18 #188C1B

tetradic

#1B188C #8C184F #898C18 #188C55

square

#1B188C #8C184F #898C18 #188C55

split-complementary

#1B188C #8C5518 #4F8C18

monochromatic

#070624 #110F58 #1B188C #2521C0 #4440DE

Accessibility & contrast

On white

13.50

#1B188C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1B188C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B188C

13.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B188C	#FFFFFF	#000000	##FFFFFF
##1B188C	1.00	13.50	1.56	13.50
#FFFFFF	13.50	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00348F

Deuteranopia (green-blind)

#00288A

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b188c;
/* rgb */ color: rgb(27, 24, 140);
/* oklch */ color: oklch(32.1% 0.179 271.2);

Tailwind

colors: {
  custom: {
    50: '#6e58af',
    500: '#1b188c',
    950: '#000000',
  },
}

SCSS

$custom: #1b188c;
$custom-light: #6e58af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b188c",
  "rgb": {
    "r": 27,
    "g": 24,
    "b": 140
  },
  "hsl": {
    "h": 241.552,
    "s": 70.732,
    "l": 32.157
  },
  "oklch": {
    "l": 0.32127,
    "c": 0.17942,
    "h": 271.2
  },
  "luminance": 0.0278
}

Semantic roles & 50–950 ramp

primary

#1B188C

secondary

#BCBF41

accent

#ED3AE9

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090311

muted

#7B7880

Preview Lab

Preview with #1B188C

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

Preview Lab → · Contrast checker → · Palette generator →