1: Download all files and open the DBO Unpacker Note then the actual program. Let it finish what it is doing (This may take up to 30 mins or more). When it is done open the new folder "unpacked".
2: Go in unpacked then go to the texture folder. There you shall see where
3: Open the unpacked folder (DBO_CT_TW -> unpacked)
4: When its done loading u go open it and go to the item folder
5: Choose a Dogi to mod (For example) a_cos_05_j1_h_m
6: Open it with the Paint.net program. It should look like the rectangle below

7: U may use the Magic Wand Tool To Select the Area or range of colors u would like to mod. But OFC Choose ur color 1st.
8: After u have selected the area to change the color of, go to the paint bucket button and click the area u have higlighted and bam thats the new color
9: Now continue to do this with every item u want to change such as the dogi and the belt. If there are dots or lines that dont go with the color u made the dogi, simply choose the 1st option (a square) and drag throughout the whole rectangle. Use the pencil Option and actually choose a darker version of ur color then fill them in urself.
10: Now Go To File then choose "Save As" and Put It In the Dogi Folder u made
11: Once this is done u open resource tool (most likely as admin) and open throught this fashion. texture -> item -> (the code for ur mod like a_cos_05_h_m) Right click then choose the option overright. Choose ur mod then let it save it to DBO
12: Enter DBO and see how u did!
Another Mod I made by using this