Update 23: The Sacrifice is live and brought with it many UI themes/changes AND 2 free Themes specifically designed with our visually impaired and color blind Tenno in mind: Equinox Theme (B&W theme) 
High Contrast Theme
We have exactly 131 screens in Warframe that need an artistic pass to the new style. 8 are done and ready to go, here are some of the UI locations you can test these themes out in: Inventory menus Simulacrum  Cetus Vendors  Once you’ve had a chance to check them out for yourself, we’d love to get your feedback so that we can improve Warframe’s accessibility.  Thank you and we hope you enjoy the update!

Work on Labels is in progress: