#1B1578#1B1578

#1B1578 is a dark, vivid blue. Relative luminance 0.021; OKLCH L 29.3% C 0.157 H 273.5°. Best body text is #FFFFFF at 14.74:1 contrast (WCAG AA passes).

Color values

HEX	#1B1578
RGB	rgb(27, 21, 120)
HSL	hsl(244, 70%, 28%)
HSV	hsv(244, 83%, 47%)
CMYK	cmyk(77.5%, 82.5%, 0%, 52.9%)
CIE-LAB	lab(16.13, 36.99, -54.29)
CIE-LCH	lch(16.13, 65.69, 304.27°)
OKLab	oklab(29.32% 0.0095 -0.157)
OKLCH	oklch(29.32% 0.157 273.5)
XYZ	xyz(4.1092, 2.1250, 17.9593)
Luminance	0.0213 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1578 #727815

analogous

#154178 #1B1578 #4C1578

triadic

#1B1578 #781B15 #15781B

tetradic

#1B1578 #781541 #727815 #15784C

square

#1B1578 #781541 #727815 #15784C

split-complementary

#1B1578 #784C15 #417815

monochromatic

#06051A #0F0C44 #1B1578 #271EAC #382DDA

Accessibility & contrast

On white

14.74

#1B1578 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#1B1578 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1578

14.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1578	#FFFFFF	#000000	##FFFFFF
##1B1578	1.00	14.74	1.43	14.74
#FFFFFF	14.74	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D7B

Deuteranopia (green-blind)

#002376

Tritanopia (blue-blind)

#003447

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #1b1578;
/* rgb */ color: rgb(27, 21, 120);
/* oklch */ color: oklch(29.3% 0.157 273.5);

Tailwind

colors: {
  custom: {
    50: '#6955a0',
    500: '#1b1578',
    950: '#000000',
  },
}

SCSS

$custom: #1b1578;
$custom-light: #6955a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1578",
  "rgb": {
    "r": 27,
    "g": 21,
    "b": 120
  },
  "hsl": {
    "h": 243.636,
    "s": 70.213,
    "l": 27.647
  },
  "oklch": {
    "l": 0.29318,
    "c": 0.15734,
    "h": 273.5
  },
  "luminance": 0.02125
}

Semantic roles & 50–950 ramp

primary

#1B1578

secondary

#A7AE3B

accent

#ED3BE2

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07030F

muted

#7A787F

Preview Lab

Preview with #1B1578

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

Preview Lab → · Contrast checker → · Palette generator →