#1B43AD#1B43AD

#1B43AD is a dark, vivid blue. Relative luminance 0.073; OKLCH L 42.7% C 0.175 H 264.3°. Best body text is #FFFFFF at 8.56:1 contrast (WCAG AA passes).

Color values

HEX	#1B43AD
RGB	rgb(27, 67, 173)
HSL	hsl(224, 73%, 39%)
HSV	hsv(224, 84%, 68%)
CMYK	cmyk(84.4%, 61.3%, 0%, 32.2%)
CIE-LAB	lab(32.40, 27.42, -60.27)
CIE-LCH	lch(32.40, 66.22, 294.46°)
OKLab	oklab(42.74% -0.0174 -0.1744)
OKLCH	oklch(42.74% 0.175 264.3)
XYZ	xyz(9.9993, 7.2632, 40.4020)
Luminance	0.0726 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B43AD #AD851B

analogous

#1B8CAD #1B43AD #3C1BAD

triadic

#1B43AD #AD1B43 #43AD1B

tetradic

#1B43AD #AD1B8C #AD851B #1BAD3C

square

#1B43AD #AD1B8C #AD851B #1BAD3C

split-complementary

#1B43AD #AD3C1B #8CAD1B

monochromatic

#0A1A43 #132E78 #1B43AD #285ADD #5D82E6

Accessibility & contrast

On white

8.56

#1B43AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#1B43AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B43AD

8.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B43AD	#FFFFFF	#000000	##FFFFFF
##1B43AD	1.00	8.56	2.45	8.56
#FFFFFF	8.56	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B0

Deuteranopia (green-blind)

#0046AB

Tritanopia (blue-blind)

#005E71

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1b43ad;
/* rgb */ color: rgb(27, 67, 173);
/* oklch */ color: oklch(42.7% 0.175 264.3);

Tailwind

colors: {
  custom: {
    50: '#7376c6',
    500: '#1b43ad',
    950: '#000000',
  },
}

SCSS

$custom: #1b43ad;
$custom-light: #7376c6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b43ad",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 173
  },
  "hsl": {
    "h": 223.562,
    "s": 73,
    "l": 39.216
  },
  "oklch": {
    "l": 0.42741,
    "c": 0.1753,
    "h": 264.3
  },
  "luminance": 0.07264
}

Semantic roles & 50–950 ramp

primary

#1B43AD

secondary

#CAAB5A

accent

#BD38F0

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1B43AD

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

Preview Lab → · Contrast checker → · Palette generator →