#1B2373#1B2373

#1B2373 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.0% C 0.136 H 271.3°. Best body text is #FFFFFF at 13.68:1 contrast (WCAG AA passes).

Color values

HEX	#1B2373
RGB	rgb(27, 35, 115)
HSL	hsl(235, 62%, 28%)
HSV	hsv(235, 77%, 45%)
CMYK	cmyk(76.5%, 69.6%, 0%, 54.9%)
CIE-LAB	lab(18.68, 26.53, -46.86)
CIE-LCH	lch(18.68, 53.85, 299.51°)
OKLab	oklab(30.97% 0.0031 -0.1355)
OKLCH	oklch(30.97% 0.136 271.3)
XYZ	xyz(4.1465, 2.6725, 16.5136)
Luminance	0.0267 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2373 #736B1B

analogous

#1B4F73 #1B2373 #3F1B73

triadic

#1B2373 #731B23 #23731B

tetradic

#1B2373 #731B4F #736B1B #1B733F

square

#1B2373 #731B4F #736B1B #1B733F

split-complementary

#1B2373 #733F1B #4F731B

monochromatic

#060819 #0F1441 #1B2373 #2732A5 #3846D0

Accessibility & contrast

On white

13.68

#1B2373 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#1B2373 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2373

13.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2373	#FFFFFF	#000000	##FFFFFF
##1B2373	1.00	13.68	1.53	13.68
#FFFFFF	13.68	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003275

Deuteranopia (green-blind)

#002972

Tritanopia (blue-blind)

#003847

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1b2373;
/* rgb */ color: rgb(27, 35, 115);
/* oklch */ color: oklch(31.0% 0.136 271.3);

Tailwind

colors: {
  custom: {
    50: '#665e9c',
    500: '#1b2373',
    950: '#000000',
  },
}

SCSS

$custom: #1b2373;
$custom-light: #665e9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2373",
  "rgb": {
    "r": 27,
    "g": 35,
    "b": 115
  },
  "hsl": {
    "h": 234.545,
    "s": 61.972,
    "l": 27.843
  },
  "oklch": {
    "l": 0.30973,
    "c": 0.13554,
    "h": 271.3
  },
  "luminance": 0.02673
}

Semantic roles & 50–950 ramp

primary

#1B2373

secondary

#A89E42

accent

#D643E5

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1B2373

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

Preview Lab → · Contrast checker → · Palette generator →