#1F43AD#1F43AD

#1F43AD is a dark, vivid blue. Relative luminance 0.073; OKLCH L 42.9% C 0.174 H 265.2°. Best body text is #FFFFFF at 8.52:1 contrast (WCAG AA passes).

Color values

HEX	#1F43AD
RGB	rgb(31, 67, 173)
HSL	hsl(225, 70%, 40%)
HSV	hsv(225, 82%, 68%)
CMYK	cmyk(82.1%, 61.3%, 0%, 32.2%)
CIE-LAB	lab(32.53, 27.75, -60.06)
CIE-LCH	lch(32.53, 66.16, 294.80°)
OKLab	oklab(42.87% -0.0147 -0.1737)
OKLCH	oklch(42.87% 0.174 265.2)
XYZ	xyz(10.1124, 7.3215, 40.4073)
Luminance	0.0732 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F43AD #AD891F

analogous

#1F8AAD #1F43AD #421FAD

triadic

#1F43AD #AD1F43 #43AD1F

tetradic

#1F43AD #AD1F8A #AD891F #1FAD42

square

#1F43AD #AD1F8A #AD891F #1FAD42

split-complementary

#1F43AD #AD421F #8AAD1F

monochromatic

#0C1B45 #162F79 #1F43AD #2F5BDA #6384E3

Accessibility & contrast

On white

8.52

#1F43AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#1F43AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F43AD

8.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F43AD	#FFFFFF	#000000	##FFFFFF
##1F43AD	1.00	8.52	2.46	8.52
#FFFFFF	8.52	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.52	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: #1f43ad;
/* rgb */ color: rgb(31, 67, 173);
/* oklch */ color: oklch(42.9% 0.174 265.2);

Tailwind

colors: {
  custom: {
    50: '#7476c6',
    500: '#1f43ad',
    950: '#000000',
  },
}

SCSS

$custom: #1f43ad;
$custom-light: #7476c6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f43ad",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 173
  },
  "hsl": {
    "h": 224.789,
    "s": 69.608,
    "l": 40
  },
  "oklch": {
    "l": 0.42874,
    "c": 0.17436,
    "h": 265.2
  },
  "luminance": 0.07323
}

Semantic roles & 50–950 ramp

primary

#1F43AD

secondary

#C8AE60

accent

#C03BEC

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1F43AD

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

Preview Lab → · Contrast checker → · Palette generator →