a70ab433_t___Tutorials___Colour_Filters__Yellow
[0] Mars [Red] Enhances polar caps [Orange] Darkens maria and canali [Green] Increases contrast of polar caps and dust storms [Blue] Improves polar caps and some surface features [Violet] Improves polar caps [Yellow] 
Darkens maria and canali
The Astronomical Unit - Tutorials - Colour Filters
Yellow