gradient names for items

how can i make gradient names for items like that https://minecraft.menu/minecraft-rgb-generator

i just tried it like §x§F§B§0§0§0§0M§x§F§B§1§4§1§4i§x§F§C§2§7§2§7n§x§F§C§3§B§3§Be§x§F§C§4§E§4§Ec§x§F§D§6§2§6§2r§x§F§D§7§6§7§6a§x§F§D§8§9§8§9f§x§F§D§9§D§9§Dt§x§F§E§B§1§B§1.§x§F§E§C§4§C§4M§x§F§E§D§8§D§8e§x§F§F§E§B§E§Bn§x§F§F§F§F§F§Fu 

but it didnt work :(