Importing JSON file in TypeScript

I have a JSON file that looks like following:

{

  "primaryBright":    "#2DC6FB",
  "primaryMain":      "#05B4F0",
  "primaryDarker":    "#04A1D7",
  "primaryDarkest":   "#048FBE",

  "secondaryBright":  "#4CD2C0",
  "secondaryMain":    "#00BFA5",
  "secondaryDarker":  "#009884",
  "secondaryDarkest": "#007F6E",

  "tertiaryMain":     "#FA555A",
  "tertiaryDarker":   "#F93C42",
  "tertiaryDarkest":  "#F9232A",

  "darkGrey":         "#333333",
  "lightGrey":        "#777777"
}

I’m trying to import it into a .tsx file. For this I added this to the type definition:

declare module "*.json" {
  const value: any;
  export default value;
}

And I’m importing it like this.

import colors = require('../colors.json')

And in the file, I use the color primaryMain as colors.primaryMain. However I get an error:

Property ‘primaryMain’ does not exist on type ‘typeof “*.json”