#1B188A#1B188A

#1B188A is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.9% C 0.177 H 271.3°. Best body text is #FFFFFF at 13.60:1 contrast (WCAG AA passes).

Color values

HEX	#1B188A
RGB	rgb(27, 24, 138)
HSL	hsl(242, 70%, 32%)
HSV	hsv(242, 83%, 54%)
CMYK	cmyk(80.4%, 82.6%, 0%, 45.9%)
CIE-LAB	lab(18.89, 41.41, -61.13)
CIE-LCH	lch(18.89, 73.84, 304.11°)
OKLab	oklab(31.88% 0.0041 -0.1769)
OKLCH	oklch(31.88% 0.177 271.3)
XYZ	xyz(5.3645, 2.7207, 24.2822)
Luminance	0.0272 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B188A #878A18

analogous

#184E8A #1B188A #54188A

triadic

#1B188A #8A1B18 #188A1B

tetradic

#1B188A #8A184E #878A18 #188A54

square

#1B188A #8A184E #878A18 #188A54

split-complementary

#1B188A #8A5418 #4E8A18

monochromatic

#070622 #110F56 #1B188A #2521BE #433FDE

Accessibility & contrast

On white

13.60

#1B188A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1B188A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B188A

13.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B188A	#FFFFFF	#000000	##FFFFFF
##1B188A	1.00	13.60	1.54	13.60
#FFFFFF	13.60	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00338D

Deuteranopia (green-blind)

#002888

Tritanopia (blue-blind)

#003C52

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b188a;
/* rgb */ color: rgb(27, 24, 138);
/* oklch */ color: oklch(31.9% 0.177 271.3);

Tailwind

colors: {
  custom: {
    50: '#6e58ad',
    500: '#1b188a',
    950: '#000000',
  },
}

SCSS

$custom: #1b188a;
$custom-light: #6e58ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b188a",
  "rgb": {
    "r": 27,
    "g": 24,
    "b": 138
  },
  "hsl": {
    "h": 241.579,
    "s": 70.37,
    "l": 31.765
  },
  "oklch": {
    "l": 0.31883,
    "c": 0.177,
    "h": 271.3
  },
  "luminance": 0.02721
}

Semantic roles & 50–950 ramp

primary

#1B188A

secondary

#BABD40

accent

#ED3BE8

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090310

muted

#7B787F

Preview Lab

Preview with #1B188A

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

Preview Lab → · Contrast checker → · Palette generator →