Index Match / Vlookup / Other formula needed

Hello all

I have been trawling this forum and google to try and get an answer to my problem but so far had little luck for the way I would ideally like it to work.

Untitled-2.jpg

Above is the spreadsheet I am trying to sort, I would like the desired results to show as per J3:J10. The result depends on the yellow box (J1) to correspond to row 2 and also only display the colors in column B if there is a "O" in the column that matches J1.

I also don't want any empty cells when colors aren't available.

This might be something very simple but i'm not sure of the terminology to find the right answer.

Thank you in advance for taking the time to look.