Wrong color shown when using color_overrides in Kitty

[jerboa88]

Description

When using kitty terminal, certain colors added to the color_overrides config section are shown incorrectly. For example, setting text = "#dedeff" results in yellow text being shown.

Cause: The workaround for kitty transparency implementation in lua/catppuccin/palettes/init.lua treats the input color as a single integer, and incrementing this integer can cause the green and blue channels to roll over to 0 if they are already at max brightness.

Neovim version

NVIM v0.9.5
Build type: Release
LuaJIT 2.1.1692716794

Terminal and multiplexer

kitty 0.32.1

Catppuccin version / branch / rev

main

Steps to reproduce

1. Run nvim -u repro.lua in kitty terminal
2. Observe the text color is yellow, rather than white

Expected behavior

Displayed colors should match what is defined in color_overrides

Actual behavior

Displayed colors are incorrect when defining colors in color_overrides that end in ff or ffff

Repro

-- DO NOT change the paths and don't remove the colorscheme
local root = vim.fn.fnamemodify("./.repro", ":p")

-- set stdpaths to use .repro
for _, name in ipairs({ "config", "data", "state", "cache" }) do
	vim.env[("XDG_%s_HOME"):format(name:upper())] = root .. "/" .. name
end

-- bootstrap lazy
local lazypath = root .. "/plugins/lazy.nvim"
if not vim.loop.fs_stat(lazypath) then
	vim.fn.system({ "git", "clone", "--filter=blob:none", "https://github.com/folke/lazy.nvim.git", lazypath })
end
vim.opt.runtimepath:prepend(lazypath)

-- install plugins
local plugins = {
	{
		"catppuccin/nvim",
		name = "catppuccin",
		opts = {
			color_overrides = {
				all = {
					text = "#dedeff", -- This will be displayed incorrectly as #dede00
					-- text = "#dedefe", -- This will be displayed correctly as #dedeff
				}
			}
		},
	},
}
require("lazy").setup(plugins, {
	root = root .. "/plugins",
})

vim.cmd.colorscheme("catppuccin")
-- add anything else here