#1B2873#1B2873

#1B2873 is a dark, vivid blue. Relative luminance 0.030; OKLCH L 31.9% C 0.129 H 269.8°. Best body text is #FFFFFF at 13.14:1 contrast (WCAG AA passes).

Color values

HEX	#1B2873
RGB	rgb(27, 40, 115)
HSL	hsl(231, 62%, 28%)
HSV	hsv(231, 77%, 45%)
CMYK	cmyk(76.5%, 65.2%, 0%, 54.9%)
CIE-LAB	lab(20.00, 23.07, -44.71)
CIE-LCH	lch(20.00, 50.31, 297.29°)
OKLab	oklab(31.94% -0.0005 -0.1292)
OKLCH	oklch(31.94% 0.129 269.8)
XYZ	xyz(4.3042, 2.9879, 16.5662)
Luminance	0.0299 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2873 #73661B

analogous

#1B5473 #1B2873 #3A1B73

triadic

#1B2873 #731B28 #28731B

tetradic

#1B2873 #731B54 #73661B #1B733A

square

#1B2873 #731B54 #73661B #1B733A

split-complementary

#1B2873 #733A1B #54731B

monochromatic

#060919 #0F1741 #1B2873 #2739A5 #384FD0

Accessibility & contrast

On white

13.14

#1B2873 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#1B2873 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2873

13.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2873	#FFFFFF	#000000	##FFFFFF
##1B2873	1.00	13.14	1.60	13.14
#FFFFFF	13.14	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003475

Deuteranopia (green-blind)

#002C72

Tritanopia (blue-blind)

#003B49

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b2873;
/* rgb */ color: rgb(27, 40, 115);
/* oklch */ color: oklch(31.9% 0.129 269.8);

Tailwind

colors: {
  custom: {
    50: '#66619c',
    500: '#1b2873',
    950: '#000000',
  },
}

SCSS

$custom: #1b2873;
$custom-light: #66619c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2873",
  "rgb": {
    "r": 27,
    "g": 40,
    "b": 115
  },
  "hsl": {
    "h": 231.136,
    "s": 61.972,
    "l": 27.843
  },
  "oklch": {
    "l": 0.31936,
    "c": 0.12917,
    "h": 269.8
  },
  "luminance": 0.02988
}

Semantic roles & 50–950 ramp

primary

#1B2873

secondary

#A89942

accent

#CD43E5

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07050E

muted

#7A797E

Preview Lab

Preview with #1B2873

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

Preview Lab → · Contrast checker → · Palette generator →