#1B1B8B#1B1B8B

#1B1B8B is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.4% C 0.176 H 271.0°. Best body text is #FFFFFF at 13.32:1 contrast (WCAG AA passes).

Color values

HEX	#1B1B8B
RGB	rgb(27, 27, 139)
HSL	hsl(240, 67%, 33%)
HSV	hsv(240, 81%, 55%)
CMYK	cmyk(80.6%, 80.6%, 0%, 45.5%)
CIE-LAB	lab(19.56, 40.16, -60.65)
CIE-LCH	lch(19.56, 72.74, 303.51°)
OKLab	oklab(32.39% 0.003 -0.1756)
OKLCH	oklch(32.39% 0.176 271)
XYZ	xyz(5.5025, 2.8803, 24.6870)
Luminance	0.0288 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1B8B #8B8B1B

analogous

#1B538B #1B1B8B #531B8B

triadic

#1B1B8B #8B1B1B #1B8B1B

tetradic

#1B1B8B #8B1B53 #8B8B1B #1B8B53

square

#1B1B8B #8B1B53 #8B8B1B #1B8B53

split-complementary

#1B1B8B #8B531B #538B1B

monochromatic

#070725 #111158 #1B1B8B #2525BE #4545DB

Accessibility & contrast

On white

13.32

#1B1B8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1B1B8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1B8B

13.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1B8B	#FFFFFF	#000000	##FFFFFF
##1B1B8B	1.00	13.32	1.58	13.32
#FFFFFF	13.32	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358E

Deuteranopia (green-blind)

#002A89

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b1b8b;
/* rgb */ color: rgb(27, 27, 139);
/* oklch */ color: oklch(32.4% 0.176 271.0);

Tailwind

colors: {
  custom: {
    50: '#6e5aae',
    500: '#1b1b8b',
    950: '#000000',
  },
}

SCSS

$custom: #1b1b8b;
$custom-light: #6e5aae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1b8b",
  "rgb": {
    "r": 27,
    "g": 27,
    "b": 139
  },
  "hsl": {
    "h": 240,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.32386,
    "c": 0.17562,
    "h": 271
  },
  "luminance": 0.02881
}

Semantic roles & 50–950 ramp

primary

#1B1B8B

secondary

#BCBC45

accent

#EA3DEA

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090410

muted

#7B797F

Preview Lab

Preview with #1B1B8B

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

Preview Lab → · Contrast checker → · Palette generator →