#1B42AD#1B42AD

#1B42AD is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.5% C 0.177 H 264.5°. Best body text is #FFFFFF at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#1B42AD
RGB	rgb(27, 66, 173)
HSL	hsl(224, 73%, 39%)
HSV	hsv(224, 84%, 68%)
CMYK	cmyk(84.4%, 61.8%, 0%, 32.2%)
CIE-LAB	lab(32.14, 28.09, -60.70)
CIE-LCH	lch(32.14, 66.89, 294.83°)
OKLab	oklab(42.55% -0.0169 -0.1757)
OKLCH	oklch(42.55% 0.177 264.5)
XYZ	xyz(9.9404, 7.1453, 40.3823)
Luminance	0.0715 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B42AD #AD861B

analogous

#1B8BAD #1B42AD #3D1BAD

triadic

#1B42AD #AD1B42 #42AD1B

tetradic

#1B42AD #AD1B8B #AD861B #1BAD3D

square

#1B42AD #AD1B8B #AD861B #1BAD3D

split-complementary

#1B42AD #AD3D1B #8BAD1B

monochromatic

#0A1A43 #132E78 #1B42AD #2858DD #5D81E6

Accessibility & contrast

On white

8.64

#1B42AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#1B42AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B42AD

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B42AD	#FFFFFF	#000000	##FFFFFF
##1B42AD	1.00	8.64	2.43	8.64
#FFFFFF	8.64	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B1

Deuteranopia (green-blind)

#0045AB

Tritanopia (blue-blind)

#005E71

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1b42ad;
/* rgb */ color: rgb(27, 66, 173);
/* oklch */ color: oklch(42.5% 0.177 264.5);

Tailwind

colors: {
  custom: {
    50: '#7375c6',
    500: '#1b42ad',
    950: '#000000',
  },
}

SCSS

$custom: #1b42ad;
$custom-light: #7375c6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b42ad",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 173
  },
  "hsl": {
    "h": 223.973,
    "s": 73,
    "l": 39.216
  },
  "oklch": {
    "l": 0.42545,
    "c": 0.17652,
    "h": 264.5
  },
  "luminance": 0.07147
}

Semantic roles & 50–950 ramp

primary

#1B42AD

secondary

#CAAC5A

accent

#BF38F0

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1B42AD

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

Preview Lab → · Contrast checker → · Palette generator →