#1B2883#1B2883

#1B2883 is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.5% C 0.152 H 269.5°. Best body text is #FFFFFF at 12.52:1 contrast (WCAG AA passes).

Color values

HEX	#1B2883
RGB	rgb(27, 40, 131)
HSL	hsl(233, 66%, 31%)
HSV	hsv(233, 79%, 51%)
CMYK	cmyk(79.4%, 69.5%, 0%, 48.6%)
CIE-LAB	lab(21.54, 29.29, -52.36)
CIE-LCH	lch(21.54, 60.00, 299.23°)
OKLab	oklab(33.54% -0.0014 -0.1515)
OKLCH	oklch(33.54% 0.152 269.5)
XYZ	xyz(5.3061, 3.3887, 21.8428)
Luminance	0.0339 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2883 #83761B

analogous

#1B5C83 #1B2883 #421B83

triadic

#1B2883 #831B28 #28831B

tetradic

#1B2883 #831B5C #83761B #1B8342

square

#1B2883 #831B5C #83761B #1B8342

split-complementary

#1B2883 #83421B #5C831B

monochromatic

#06091E #111950 #1B2883 #2537B6 #4154D8

Accessibility & contrast

On white

12.52

#1B2883 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1B2883 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2883

12.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2883	#FFFFFF	#000000	##FFFFFF
##1B2883	1.00	12.52	1.68	12.52
#FFFFFF	12.52	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003986

Deuteranopia (green-blind)

#002F81

Tritanopia (blue-blind)

#004152

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b2883;
/* rgb */ color: rgb(27, 40, 131);
/* oklch */ color: oklch(33.5% 0.152 269.5);

Tailwind

colors: {
  custom: {
    50: '#6a62a8',
    500: '#1b2883',
    950: '#000000',
  },
}

SCSS

$custom: #1b2883;
$custom-light: #6a62a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2883",
  "rgb": {
    "r": 27,
    "g": 40,
    "b": 131
  },
  "hsl": {
    "h": 232.5,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.33539,
    "c": 0.15156,
    "h": 269.5
  },
  "luminance": 0.03389
}

Semantic roles & 50–950 ramp

primary

#1B2883

secondary

#B6A843

accent

#D43FE9

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#080510

muted

#7A797F

Preview Lab

Preview with #1B2883

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

Preview Lab → · Contrast checker → · Palette generator →