Choose the armour, the trim pattern and the trim material for each piece, and copy ready /give commands. Every pattern and material from the game, with a check that your version has them.
Armour
Pattern
Material
All pieces:
The preview shows the armour and trim colours. The trim's shape is drawn the same for every pattern; the real pattern shows in the game.
How to use the commands
Commands need cheats on (single player: Open to LAN, Allow Cheats) or operator rights on a server.
Pick your version: the way items are written in commands changed in 1.20.5 and again in 1.21.5, and an old command is refused by a new game.
Paste one command into chat, or use Copy all to paste the whole set into a function file or the server console (there without the /).
Good to know
Armour trims came in 1.20. Flow and Bolt came in 1.21, Resin in 1.21.4 and copper armour in 1.21.9. The tool tells you when your version does not have a choice.
A trim in the same material as the armour (gold on gold, iron on iron and so on) is drawn a shade darker by the game so it still shows.
Turtle shell is a helmet only. Leather is the only armour you can dye.
In survival you put a trim on with a smithing table: the smithing template, the armour piece and the material.