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!

UPDATES:
Work on Labels is in progress: