#1B158A#1B158A

#1B158A is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.5% C 0.179 H 271.6°. Best body text is #FFFFFF at 13.81:1 contrast (WCAG AA passes).

Color values

HEX	#1B158A
RGB	rgb(27, 21, 138)
HSL	hsl(243, 74%, 31%)
HSV	hsv(243, 85%, 54%)
CMYK	cmyk(80.4%, 84.8%, 0%, 45.9%)
CIE-LAB	lab(18.38, 42.90, -61.97)
CIE-LCH	lch(18.38, 75.37, 304.69°)
OKLab	oklab(31.53% 0.0049 -0.1793)
OKLCH	oklch(31.53% 0.179 271.6)
XYZ	xyz(5.3061, 2.6037, 24.2628)
Luminance	0.0260 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B158A #848A15

analogous

#15498A #1B158A #55158A

triadic

#1B158A #8A1B15 #158A1B

tetradic

#1B158A #8A1549 #848A15 #158A55

square

#1B158A #8A1549 #848A15 #158A55

split-complementary

#1B158A #8A5515 #498A15

monochromatic

#060520 #110D55 #1B158A #251DBF #4139E1

Accessibility & contrast

On white

13.81

#1B158A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#1B158A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B158A

13.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B158A	#FFFFFF	#000000	##FFFFFF
##1B158A	1.00	13.81	1.52	13.81
#FFFFFF	13.81	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00328D

Deuteranopia (green-blind)

#002788

Tritanopia (blue-blind)

#003B51

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1b158a;
/* rgb */ color: rgb(27, 21, 138);
/* oklch */ color: oklch(31.5% 0.179 271.6);

Tailwind

colors: {
  custom: {
    50: '#6e56ad',
    500: '#1b158a',
    950: '#000000',
  },
}

SCSS

$custom: #1b158a;
$custom-light: #6e56ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b158a",
  "rgb": {
    "r": 27,
    "g": 21,
    "b": 138
  },
  "hsl": {
    "h": 243.077,
    "s": 73.585,
    "l": 31.176
  },
  "oklch": {
    "l": 0.31531,
    "c": 0.1794,
    "h": 271.6
  },
  "luminance": 0.02604
}

Semantic roles & 50–950 ramp

primary

#1B158A

secondary

#B7BE3D

accent

#F038E7

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090310

muted

#7B787F

Preview Lab

Preview with #1B158A

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

Preview Lab → · Contrast checker → · Palette generator →