#1B1373#1B1373

#1B1373 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 28.5% C 0.153 H 274.4°. Best body text is #FFFFFF at 15.14:1 contrast (WCAG AA passes).

Color values

HEX	#1B1373
RGB	rgb(27, 19, 115)
HSL	hsl(245, 72%, 26%)
HSV	hsv(245, 83%, 45%)
CMYK	cmyk(76.5%, 83.5%, 0%, 54.9%)
CIE-LAB	lab(15.15, 36.38, -52.69)
CIE-LCH	lch(15.15, 64.03, 304.63°)
OKLab	oklab(28.46% 0.0116 -0.1524)
OKLCH	oklch(28.46% 0.153 274.4)
XYZ	xyz(3.7784, 1.9362, 16.3909)
Luminance	0.0194 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1373 #6B7313

analogous

#133B73 #1B1373 #4B1373

triadic

#1B1373 #731B13 #13731B

tetradic

#1B1373 #73133B #6B7313 #13734B

square

#1B1373 #73133B #6B7313 #13734B

split-complementary

#1B1373 #734B13 #3B7313

monochromatic

#06041A #0F0A3E #1B1373 #271CA8 #3525DB

Accessibility & contrast

On white

15.14

#1B1373 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#1B1373 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1373

15.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1373	#FFFFFF	#000000	##FFFFFF
##1B1373	1.00	15.14	1.39	15.14
#FFFFFF	15.14	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A76

Deuteranopia (green-blind)

#002171

Tritanopia (blue-blind)

#003143

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #1b1373;
/* rgb */ color: rgb(27, 19, 115);
/* oklch */ color: oklch(28.5% 0.153 274.4);

Tailwind

colors: {
  custom: {
    50: '#68539c',
    500: '#1b1373',
    950: '#000000',
  },
}

SCSS

$custom: #1b1373;
$custom-light: #68539c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1373",
  "rgb": {
    "r": 27,
    "g": 19,
    "b": 115
  },
  "hsl": {
    "h": 245,
    "s": 71.642,
    "l": 26.275
  },
  "oklch": {
    "l": 0.28455,
    "c": 0.15282,
    "h": 274.4
  },
  "luminance": 0.01937
}

Semantic roles & 50–950 ramp

primary

#1B1373

secondary

#A0AA38

accent

#EE39DF

background

#F6F4F9

surface

#ECE7F2

border

#C7C3CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1B1373

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

Preview Lab → · Contrast checker → · Palette generator →