Edit: Solved! :) For those interested, use the "Color Range" option under the "Select" tab, and make sure the "Localized Colour Clusters" option is unchecked. (I assume unchecking this means whichever colour you select will be added/removed from the entire image rather than a certain region - determined by the scrollbar "Range".) To select and deselect colours, you'll see 3 color picker tools, one without any signs, one with a plus (+), and one with a (-). The plus one adds the colour you click on to the range you wish to select, while the minus one removes it from your range. Fuzziness is like feathering, I guess..? Thanks to /u/dreams-in-cmyk for the tip. :)

How do I get the words out from this image? I've gotten help from /r/photoshoprequest, and someone very nicely got it down to this, which is very good but there are still bits of blue floating around in some spaces.

Based on my very limited experience with photoshop, I was thinking that I could create a black coloured solid layer, "capture" the parts of the image that "blended" together with the black (i.e only the words), invert the selection, and then delete it. That said, I might be completely wrong, and I have no idea how to do it. Would be great if someone could teach me. :)

i want to make a background that uses an image in 15x 15. how do i achieve this?