#1B148C#1B148C

#1B148C is a dark, vivid blue. Relative luminance 0.026; OKLCH L 31.7% C 0.183 H 271.5°. Best body text is #FFFFFF at 13.77:1 contrast (WCAG AA passes).

Color values

HEX	#1B148C
RGB	rgb(27, 20, 140)
HSL	hsl(244, 75%, 31%)
HSV	hsv(244, 86%, 55%)
CMYK	cmyk(80.7%, 85.7%, 0%, 45.1%)
CIE-LAB	lab(18.48, 44.00, -63.06)
CIE-LCH	lch(18.48, 76.90, 304.90°)
OKLab	oklab(31.67% 0.0046 -0.1825)
OKLCH	oklch(31.67% 0.183 271.5)
XYZ	xyz(5.4342, 2.6262, 25.0264)
Luminance	0.0263 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B148C #858C14

analogous

#14498C #1B148C #57148C

triadic

#1B148C #8C1B14 #148C1B

tetradic

#1B148C #8C1449 #858C14 #148C57

square

#1B148C #8C1449 #858C14 #148C57

split-complementary

#1B148C #8C5714 #498C14

monochromatic

#060521 #110C56 #1B148C #251CC2 #4238E3

Accessibility & contrast

On white

13.77

#1B148C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#1B148C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B148C

13.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B148C	#FFFFFF	#000000	##FFFFFF
##1B148C	1.00	13.77	1.53	13.77
#FFFFFF	13.77	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00338F

Deuteranopia (green-blind)

#00278A

Tritanopia (blue-blind)

#003B52

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1b148c;
/* rgb */ color: rgb(27, 20, 140);
/* oklch */ color: oklch(31.7% 0.183 271.5);

Tailwind

colors: {
  custom: {
    50: '#6f56af',
    500: '#1b148c',
    950: '#000000',
  },
}

SCSS

$custom: #1b148c;
$custom-light: #6f56af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b148c",
  "rgb": {
    "r": 27,
    "g": 20,
    "b": 140
  },
  "hsl": {
    "h": 243.5,
    "s": 75,
    "l": 31.373
  },
  "oklch": {
    "l": 0.31672,
    "c": 0.18252,
    "h": 271.5
  },
  "luminance": 0.02627
}

Semantic roles & 50–950 ramp

primary

#1B148C

secondary

#B8C03C

accent

#F236E7

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090311

muted

#7B7880

Preview Lab

Preview with #1B148C

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

Preview Lab → · Contrast checker → · Palette generator →