#1B1B8A#1B1B8A

#1B1B8A is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.3% C 0.174 H 271.1°. Best body text is #FFFFFF at 13.37:1 contrast (WCAG AA passes).

Color values

HEX	#1B1B8A
RGB	rgb(27, 27, 138)
HSL	hsl(240, 67%, 32%)
HSV	hsv(240, 80%, 54%)
CMYK	cmyk(80.4%, 80.4%, 0%, 45.9%)
CIE-LAB	lab(19.44, 39.82, -60.22)
CIE-LCH	lch(19.44, 72.20, 303.47°)
OKLab	oklab(32.27% 0.0032 -0.1744)
OKLCH	oklch(32.27% 0.174 271.1)
XYZ	xyz(5.4298, 2.8512, 24.3040)
Luminance	0.0285 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1B8A #8A8A1B

analogous

#1B538A #1B1B8A #531B8A

triadic

#1B1B8A #8A1B1B #1B8A1B

tetradic

#1B1B8A #8A1B53 #8A8A1B #1B8A53

square

#1B1B8A #8A1B53 #8A8A1B #1B8A53

split-complementary

#1B1B8A #8A531B #538A1B

monochromatic

#070724 #111157 #1B1B8A #2525BD #4545DB

Accessibility & contrast

On white

13.37

#1B1B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1B1B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1B8A

13.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1B8A	#FFFFFF	#000000	##FFFFFF
##1B1B8A	1.00	13.37	1.57	13.37
#FFFFFF	13.37	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358D

Deuteranopia (green-blind)

#002988

Tritanopia (blue-blind)

#003D52

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b1b8a;
/* rgb */ color: rgb(27, 27, 138);
/* oklch */ color: oklch(32.3% 0.174 271.1);

Tailwind

colors: {
  custom: {
    50: '#6d5aad',
    500: '#1b1b8a',
    950: '#000000',
  },
}

SCSS

$custom: #1b1b8a;
$custom-light: #6d5aad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1b8a",
  "rgb": {
    "r": 27,
    "g": 27,
    "b": 138
  },
  "hsl": {
    "h": 240,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.32266,
    "c": 0.17439,
    "h": 271.1
  },
  "luminance": 0.02852
}

Semantic roles & 50–950 ramp

primary

#1B1B8A

secondary

#BCBC45

accent

#EA3EEA

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B1B8A

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

Preview Lab → · Contrast checker → · Palette generator →