#1B1B72#1B1B72

#1B1B72 is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.5% C 0.144 H 273.2°. Best body text is #FFFFFF at 14.52:1 contrast (WCAG AA passes).

Color values

HEX	#1B1B72
RGB	rgb(27, 27, 114)
HSL	hsl(240, 62%, 28%)
HSV	hsv(240, 76%, 45%)
CMYK	cmyk(76.3%, 76.3%, 0%, 55.3%)
CIE-LAB	lab(16.66, 31.40, -49.55)
CIE-LCH	lch(16.66, 58.66, 302.36°)
OKLab	oklab(29.48% 0.0081 -0.1433)
OKLCH	oklch(29.48% 0.144 273.2)
XYZ	xyz(3.8802, 2.2314, 16.1425)
Luminance	0.0223 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1B72 #72721B

analogous

#1B4672 #1B1B72 #461B72

triadic

#1B1B72 #721B1B #1B721B

tetradic

#1B1B72 #721B46 #72721B #1B7246

square

#1B1B72 #721B46 #72721B #1B7246

split-complementary

#1B1B72 #72461B #46721B

monochromatic

#060619 #0F0F41 #1B1B72 #2727A3 #3838D0

Accessibility & contrast

On white

14.52

#1B1B72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.45

#1B1B72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1B72

14.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1B72	#FFFFFF	#000000	##FFFFFF
##1B1B72	1.00	14.52	1.45	14.52
#FFFFFF	14.52	1.00	21.00	1.00
#000000	1.45	21.00	1.00	21.00
##FFFFFF	14.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D75

Deuteranopia (green-blind)

#002570

Tritanopia (blue-blind)

#003445

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #1b1b72;
/* rgb */ color: rgb(27, 27, 114);
/* oklch */ color: oklch(29.5% 0.144 273.2);

Tailwind

colors: {
  custom: {
    50: '#67589c',
    500: '#1b1b72',
    950: '#000000',
  },
}

SCSS

$custom: #1b1b72;
$custom-light: #67589c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1b72",
  "rgb": {
    "r": 27,
    "g": 27,
    "b": 114
  },
  "hsl": {
    "h": 240,
    "s": 61.702,
    "l": 27.647
  },
  "oklch": {
    "l": 0.29483,
    "c": 0.14357,
    "h": 273.2
  },
  "luminance": 0.02232
}

Semantic roles & 50–950 ramp

primary

#1B1B72

secondary

#A7A742

accent

#E543E5

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1B1B72

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

Preview Lab → · Contrast checker → · Palette generator →