#1B43AA#1B43AA

#1B43AA is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.5% C 0.171 H 264.1°. Best body text is #FFFFFF at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#1B43AA
RGB	rgb(27, 67, 170)
HSL	hsl(223, 73%, 39%)
HSV	hsv(223, 84%, 67%)
CMYK	cmyk(84.1%, 60.6%, 0%, 33.3%)
CIE-LAB	lab(32.14, 26.25, -58.90)
CIE-LCH	lch(32.14, 64.48, 294.02°)
OKLab	oklab(42.47% -0.0175 -0.1704)
OKLCH	oklch(42.47% 0.171 264.1)
XYZ	xyz(9.7123, 7.1484, 38.8903)
Luminance	0.0715 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B43AA #AA821B

analogous

#1B8AAA #1B43AA #3A1BAA

triadic

#1B43AA #AA1B43 #43AA1B

tetradic

#1B43AA #AA1B8A #AA821B #1BAA3A

square

#1B43AA #AA1B8A #AA821B #1BAA3A

split-complementary

#1B43AA #AA3A1B #8AAA1B

monochromatic

#0A1940 #132E75 #1B43AA #2659DC #5B81E5

Accessibility & contrast

On white

8.64

#1B43AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#1B43AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B43AA

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B43AA	#FFFFFF	#000000	##FFFFFF
##1B43AA	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)

#0052AD

Deuteranopia (green-blind)

#0045A8

Tritanopia (blue-blind)

#005E70

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1b43aa;
/* rgb */ color: rgb(27, 67, 170);
/* oklch */ color: oklch(42.5% 0.171 264.1);

Tailwind

colors: {
  custom: {
    50: '#7276c4',
    500: '#1b43aa',
    950: '#000000',
  },
}

SCSS

$custom: #1b43aa;
$custom-light: #7276c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b43aa",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 170
  },
  "hsl": {
    "h": 223.217,
    "s": 72.589,
    "l": 38.627
  },
  "oklch": {
    "l": 0.4247,
    "c": 0.17131,
    "h": 264.1
  },
  "luminance": 0.0715
}

Semantic roles & 50–950 ramp

primary

#1B43AA

secondary

#C9A958

accent

#BC39EF

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090813

muted

#7B7B82

Preview Lab

Preview with #1B43AA

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

Preview Lab → · Contrast checker → · Palette generator →