#1B1973#1B1973

#1B1973 is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.3% C 0.147 H 273.5°. Best body text is #FFFFFF at 14.65:1 contrast (WCAG AA passes).

Color values

HEX	#1B1973
RGB	rgb(27, 25, 115)
HSL	hsl(241, 64%, 27%)
HSV	hsv(241, 78%, 45%)
CMYK	cmyk(76.5%, 78.3%, 0%, 54.9%)
CIE-LAB	lab(16.33, 32.98, -50.73)
CIE-LCH	lch(16.33, 60.51, 303.03°)
OKLab	oklab(29.29% 0.0089 -0.1468)
OKLCH	oklch(29.29% 0.147 273.5)
XYZ	xyz(3.8931, 2.1657, 16.4292)
Luminance	0.0217 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1973 #717319

analogous

#194473 #1B1973 #481973

triadic

#1B1973 #731B19 #19731B

tetradic

#1B1973 #731944 #717319 #197348

square

#1B1973 #731944 #717319 #197348

split-complementary

#1B1973 #734819 #447319

monochromatic

#060519 #0F0E41 #1B1973 #2724A5 #3734D3

Accessibility & contrast

On white

14.65

#1B1973 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#1B1973 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1973

14.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1973	#FFFFFF	#000000	##FFFFFF
##1B1973	1.00	14.65	1.43	14.65
#FFFFFF	14.65	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D76

Deuteranopia (green-blind)

#002471

Tritanopia (blue-blind)

#003345

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #1b1973;
/* rgb */ color: rgb(27, 25, 115);
/* oklch */ color: oklch(29.3% 0.147 273.5);

Tailwind

colors: {
  custom: {
    50: '#67579c',
    500: '#1b1973',
    950: '#000000',
  },
}

SCSS

$custom: #1b1973;
$custom-light: #67579c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1973",
  "rgb": {
    "r": 27,
    "g": 25,
    "b": 115
  },
  "hsl": {
    "h": 241.333,
    "s": 64.286,
    "l": 27.451
  },
  "oklch": {
    "l": 0.29287,
    "c": 0.14703,
    "h": 273.5
  },
  "luminance": 0.02166
}

Semantic roles & 50–950 ramp

primary

#1B1973

secondary

#A6A840

accent

#E741E4

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1B1973

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

Preview Lab → · Contrast checker → · Palette generator →