How to use configuration settings to specify the letter case of hexadecimal numbers.

[ahaoboy]

https://biomejs.dev/playground/?code=YwBvAG4AcwB0ACAAdwBoAGkAdABlACAAPQAgADAAeABGAEYARgBGAEYARgA%3D

input:

const white = 0xFFFFFF

output:

const white = 0xffffff;

[Conaclos]

You can't. Biome follows Prettier conventions and normalizes to lowercase hexadecimal digits.