#1B1B87#1B1B87

#1B1B87 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.9% C 0.171 H 271.3°. Best body text is #FFFFFF at 13.52:1 contrast (WCAG AA passes).

Color values

HEX	#1B1B87
RGB	rgb(27, 27, 135)
HSL	hsl(240, 67%, 32%)
HSV	hsv(240, 80%, 53%)
CMYK	cmyk(80%, 80%, 0%, 47.1%)
CIE-LAB	lab(19.08, 38.80, -58.93)
CIE-LCH	lch(19.08, 70.56, 303.36°)
OKLab	oklab(31.91% 0.0039 -0.1706)
OKLCH	oklch(31.91% 0.171 271.3)
XYZ	xyz(5.2156, 2.7656, 23.1759)
Luminance	0.0277 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1B87 #87871B

analogous

#1B5187 #1B1B87 #511B87

triadic

#1B1B87 #871B1B #1B871B

tetradic

#1B1B87 #871B51 #87871B #1B8751

square

#1B1B87 #871B51 #87871B #1B8751

split-complementary

#1B1B87 #87511B #51871B

monochromatic

#070721 #111154 #1B1B87 #2525BA #4343D9

Accessibility & contrast

On white

13.52

#1B1B87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1B1B87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1B87

13.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1B87	#FFFFFF	#000000	##FFFFFF
##1B1B87	1.00	13.52	1.55	13.52
#FFFFFF	13.52	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00348A

Deuteranopia (green-blind)

#002985

Tritanopia (blue-blind)

#003C51

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b1b87;
/* rgb */ color: rgb(27, 27, 135);
/* oklch */ color: oklch(31.9% 0.171 271.3);

Tailwind

colors: {
  custom: {
    50: '#6d59ab',
    500: '#1b1b87',
    950: '#000000',
  },
}

SCSS

$custom: #1b1b87;
$custom-light: #6d59ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1b87",
  "rgb": {
    "r": 27,
    "g": 27,
    "b": 135
  },
  "hsl": {
    "h": 240,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.3191,
    "c": 0.17066,
    "h": 271.3
  },
  "luminance": 0.02766
}

Semantic roles & 50–950 ramp

primary

#1B1B87

secondary

#BABA44

accent

#EA3EEA

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B1B87

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

Preview Lab → · Contrast checker → · Palette generator →