#1B1D88#1B1D88

#1B1D88 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.3% C 0.170 H 271.0°. Best body text is #FFFFFF at 13.31:1 contrast (WCAG AA passes).

Color values

HEX	#1B1D88
RGB	rgb(27, 29, 136)
HSL	hsl(239, 67%, 32%)
HSV	hsv(239, 80%, 53%)
CMYK	cmyk(80.1%, 78.7%, 0%, 46.7%)
CIE-LAB	lab(19.59, 38.01, -58.71)
CIE-LCH	lch(19.59, 69.94, 302.92°)
OKLab	oklab(32.31% 0.003 -0.17)
OKLCH	oklch(32.31% 0.17 271)
XYZ	xyz(5.3338, 2.8887, 23.5642)
Luminance	0.0289 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1D88 #88861B

analogous

#1B5488 #1B1D88 #501B88

triadic

#1B1D88 #881B1D #1D881B

tetradic

#1B1D88 #881B54 #88861B #1B8850

square

#1B1D88 #881B54 #88861B #1B8850

split-complementary

#1B1D88 #88501B #54881B

monochromatic

#070722 #111255 #1B1D88 #2528BB #4446DA

Accessibility & contrast

On white

13.31

#1B1D88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1B1D88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1D88

13.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1D88	#FFFFFF	#000000	##FFFFFF
##1B1D88	1.00	13.31	1.58	13.31
#FFFFFF	13.31	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358B

Deuteranopia (green-blind)

#002A86

Tritanopia (blue-blind)

#003D52

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b1d88;
/* rgb */ color: rgb(27, 29, 136);
/* oklch */ color: oklch(32.3% 0.170 271.0);

Tailwind

colors: {
  custom: {
    50: '#6d5bac',
    500: '#1b1d88',
    950: '#000000',
  },
}

SCSS

$custom: #1b1d88;
$custom-light: #6d5bac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1d88",
  "rgb": {
    "r": 27,
    "g": 29,
    "b": 136
  },
  "hsl": {
    "h": 238.899,
    "s": 66.871,
    "l": 31.961
  },
  "oklch": {
    "l": 0.32306,
    "c": 0.17003,
    "h": 271
  },
  "luminance": 0.02889
}

Semantic roles & 50–950 ramp

primary

#1B1D88

secondary

#BBB944

accent

#E73EEA

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B1D88

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

Preview Lab → · Contrast checker → · Palette generator →