#1B1370#1B1370

#1B1370 is a dark, vivid blue. Relative luminance 0.019; OKLCH L 28.1% C 0.149 H 274.8°. Best body text is #FFFFFF at 15.29:1 contrast (WCAG AA passes).

Color values

HEX	#1B1370
RGB	rgb(27, 19, 112)
HSL	hsl(245, 71%, 26%)
HSV	hsv(245, 83%, 44%)
CMYK	cmyk(75.9%, 83%, 0%, 56.1%)
CIE-LAB	lab(14.78, 35.37, -51.35)
CIE-LCH	lch(14.78, 62.36, 304.56°)
OKLab	oklab(28.09% 0.0124 -0.1485)
OKLCH	oklch(28.09% 0.149 274.8)
XYZ	xyz(3.6085, 1.8683, 15.4965)
Luminance	0.0187 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1370 #687013

analogous

#133970 #1B1370 #491370

triadic

#1B1370 #701B13 #13701B

tetradic

#1B1370 #701339 #687013 #137049

square

#1B1370 #701339 #687013 #137049

split-complementary

#1B1370 #704913 #397013

monochromatic

#06041A #0E0A3C #1B1370 #281CA4 #3425D9

Accessibility & contrast

On white

15.29

#1B1370 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#1B1370 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1370

15.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1370	#FFFFFF	#000000	##FFFFFF
##1B1370	1.00	15.29	1.37	15.29
#FFFFFF	15.29	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002973

Deuteranopia (green-blind)

#00216E

Tritanopia (blue-blind)

#003042

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #1b1370;
/* rgb */ color: rgb(27, 19, 112);
/* oklch */ color: oklch(28.1% 0.149 274.8);

Tailwind

colors: {
  custom: {
    50: '#67539a',
    500: '#1b1370',
    950: '#000000',
  },
}

SCSS

$custom: #1b1370;
$custom-light: #67539a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1370",
  "rgb": {
    "r": 27,
    "g": 19,
    "b": 112
  },
  "hsl": {
    "h": 245.161,
    "s": 70.992,
    "l": 25.686
  },
  "oklch": {
    "l": 0.28091,
    "c": 0.14902,
    "h": 274.8
  },
  "luminance": 0.01869
}

Semantic roles & 50–950 ramp

primary

#1B1370

secondary

#9DA738

accent

#EE3ADE

background

#F6F4F9

surface

#EBE7F2

border

#C6C3CC

text

#07020E

muted

#7A787E

Preview Lab

Preview with #1B1370

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

Preview Lab → · Contrast checker → · Palette generator →