#1B158D#1B158D

#1B158D is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.9% C 0.183 H 271.3°. Best body text is #FFFFFF at 13.65:1 contrast (WCAG AA passes).

Color values

HEX	#1B158D
RGB	rgb(27, 21, 141)
HSL	hsl(243, 74%, 32%)
HSV	hsv(243, 85%, 55%)
CMYK	cmyk(80.9%, 85.1%, 0%, 44.7%)
CIE-LAB	lab(18.76, 43.85, -63.22)
CIE-LCH	lch(18.76, 76.94, 304.75°)
OKLab	oklab(31.91% 0.0042 -0.1829)
OKLCH	oklch(31.91% 0.183 271.3)
XYZ	xyz(5.5263, 2.6918, 25.4225)
Luminance	0.0269 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B158D #878D15

analogous

#154B8D #1B158D #57158D

triadic

#1B158D #8D1B15 #158D1B

tetradic

#1B158D #8D154B #878D15 #158D57

square

#1B158D #8D154B #878D15 #158D57

split-complementary

#1B158D #8D5715 #4B8D15

monochromatic

#070522 #110D58 #1B158D #251DC2 #433BE2

Accessibility & contrast

On white

13.65

#1B158D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1B158D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B158D

13.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B158D	#FFFFFF	#000000	##FFFFFF
##1B158D	1.00	13.65	1.54	13.65
#FFFFFF	13.65	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003390

Deuteranopia (green-blind)

#00278B

Tritanopia (blue-blind)

#003C53

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b158d;
/* rgb */ color: rgb(27, 21, 141);
/* oklch */ color: oklch(31.9% 0.183 271.3);

Tailwind

colors: {
  custom: {
    50: '#6f57b0',
    500: '#1b158d',
    950: '#000000',
  },
}

SCSS

$custom: #1b158d;
$custom-light: #6f57b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b158d",
  "rgb": {
    "r": 27,
    "g": 21,
    "b": 141
  },
  "hsl": {
    "h": 243,
    "s": 74.074,
    "l": 31.765
  },
  "oklch": {
    "l": 0.31905,
    "c": 0.18297,
    "h": 271.3
  },
  "luminance": 0.02692
}

Semantic roles & 50–950 ramp

primary

#1B158D

secondary

#BAC13D

accent

#F137E7

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1B158D

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

Preview Lab → · Contrast checker → · Palette generator →