Well, continuing on with the crystal theming, a metal just doesn't make a ton of sense, regardless of how shiny.
I think a reflective white or a nice sky blue would be pretty good. Perhaps even a dark red.

Additional information on the actor and how COVID-19 has had an effect on the show.

http://ukiyaseed.weebly.com/ukiyasee...actor-revealed

Looks like KiramaiSilver will appear his first appearance on TV by early June:

https://nihonhero.weebly.com/home/ki...o-ex-aid-ghost

Previously, he was on Kamen Riders Ghost, Ex-Aid and Zi-O. Now, he's gonna put his Super Sentai appearance to the test and once this COVID-19 will be dissipated soon and resumed filming productions, he may joined forces with another Sixth Sentai Hero actor Hyoudo Katsumi (Canalo/RyusoulGold) in a possible team-up movie with the Ryusoulgers for 2021 (when will it be will be announced in the future) and in the future, a mysterious Sixth Sentai Hero (or possibly Heroine) of the 2021 Super Sentai Series for the 45th Anniversary.

Slight correction, he wasn't in Ghost, Ex-Aid or Zi-O, he's part of the same acting agency that the main actors for Ghost, Ex-Aid and Zi-O are from.

Linda wish we got Cyan but oh well also so no hiatus but COVID-19 IS going to affect the plot to a degree kinda wish we got a bad guy 6th again (like one that starts off evil but turns good)

He's mecha could be a tank.

Honestly the only part of the design I don't like are those arm gloves; they would look a lot better if they looked more like armor or maybe like most gundam have some kind of armored orange side peice seperate from the silver arm.