#1B188B#1B188B

#1B188B is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.0% C 0.178 H 271.3°. Best body text is #FFFFFF at 13.55:1 contrast (WCAG AA passes).

Color values

HEX	#1B188B
RGB	rgb(27, 24, 139)
HSL	hsl(242, 71%, 32%)
HSV	hsv(242, 83%, 55%)
CMYK	cmyk(80.6%, 82.7%, 0%, 45.5%)
CIE-LAB	lab(19.01, 41.74, -61.55)
CIE-LCH	lch(19.01, 74.37, 304.14°)
OKLab	oklab(32.01% 0.0039 -0.1782)
OKLCH	oklch(32.01% 0.178 271.3)
XYZ	xyz(5.4373, 2.7498, 24.6653)
Luminance	0.0275 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B188B #888B18

analogous

#184F8B #1B188B #55188B

triadic

#1B188B #8B1B18 #188B1B

tetradic

#1B188B #8B184F #888B18 #188B55

square

#1B188B #8B184F #888B18 #188B55

split-complementary

#1B188B #8B5518 #4F8B18

monochromatic

#070623 #110F57 #1B188B #2521BF #443FDE

Accessibility & contrast

On white

13.55

#1B188B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1B188B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B188B

13.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B188B	#FFFFFF	#000000	##FFFFFF
##1B188B	1.00	13.55	1.55	13.55
#FFFFFF	13.55	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.55	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: #1b188b;
/* rgb */ color: rgb(27, 24, 139);
/* oklch */ color: oklch(32.0% 0.178 271.3);

Tailwind

colors: {
  custom: {
    50: '#6e58ae',
    500: '#1b188b',
    950: '#000000',
  },
}

SCSS

$custom: #1b188b;
$custom-light: #6e58ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b188b",
  "rgb": {
    "r": 27,
    "g": 24,
    "b": 139
  },
  "hsl": {
    "h": 241.565,
    "s": 70.552,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32005,
    "c": 0.17821,
    "h": 271.3
  },
  "luminance": 0.0275
}

Semantic roles & 50–950 ramp

primary

#1B188B

secondary

#BBBE40

accent

#ED3AE9

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090310

muted

#7B787F

Preview Lab

Preview with #1B188B

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

Preview Lab → · Contrast checker → · Palette generator →