How to add new colors to tailwind-css and keep the original ones?

How can I add colors to default scheme? Here is my tailwindcss file.

const { colors: defaultColors } = require('tailwindcss/defaultTheme')

module.exports = {
    "theme": {
        "colors": defaultColors + {
            "custom-yellow": {
                "500": "#EDAE0A",
            }
        },
    },
};

You can simply concatinate them using "Array/Object spread operator" (...) and gather them all in a colors variable.

// tailwind.config.js
const { colors: defaultColors } = require('tailwindcss/defaultTheme')

const colors = {
    ...defaultColors,
    ...{
        "custom-yellow": {
            "500": "#EDAE0A",
        },
    },
}

module.exports = {
    "theme": {
        "colors": colors,
    }
};