obtainment method : Firstly, the hint says "Name" the word "Hexed" contains the word "Hex" which could be derived from "Hex codes" from colors. now secondly, "6 different" now since we know Hex codes are going to be used. there will be 6 miscolored blocks over Devamped dimension. Now we know to get the hex codes from this miscolored blocks. Now finally, "letters to numbers+number.add=x3", the user has to convert the letters into numbers in the hex code for ex. "#FFF000 = 666000 (you will add the other numbers)" now you will do that for the rest of the other miscolored blocks. now finally the last part you will add all of the converted hex codes from the miscolored blocks and add it, the "=x3" means to multiply the sum.
let me know if the design is good enough for its difficulty or if the difficulty is exaggerated the difficulty might be degraded into insane or extreme, it's only hard because of the bad indicators in the puzzle and hint...