Beige triangular cutout on 'dark green background' bath towel set

This image is submitted to a 'sepia' filter that left it with shades of beige or brown (khaki), however, it has 'colourless' parts, and is on a dark green background colour (maybe the dark green looks superimposed on the image). You can, using the options on the website, change the image filter so that it is greenish with shades of cyan and mint, grey or blue, but you can also change the background colour 'dark green' for any colour, so you will have almost infinite possible combinations.