2/ Add a new layer:
3/ Fill that new layer with dark blue (my one's html is #0a146e)
4/ Set the blue layer to 'Exclusion', instead of 'Normal':
5/ Add another layer, and this time fill with light brown (#955a07)
6/ Set the brown layer to 'Screen', and change it's opacity to around 32 (give or take, depending on your pic).
7/ Done! :)
Sorry if it's not that good but I've never made a tutorial before :0 GL!