If you take Supernatural reflexes with Luke Skywalker and the S Servo motors for the X-Wing can he boost without taking damage from doing the Boost action from Supernatural reflexes since he technically has a red boost?

Luke can use Supernatural Reflexes to boost without taking damage if his Servomotor S-foils are closed. (Note that with S-foils closed, he has a white boost and and a focus linked to red boost.)

When the S-foils are closed Luke has Boost on his action bar. When the s-foils are open Luke does not have Boost on his action bar. Closed s-foils Luke does not take a damage from using Supernatural Reflexes to boost. Open S-foils Luke takes a damage from using Supernatural Reflexes to boost.

The color of the action has no bearing on whether or not you take a damage from Supernatural Reflexes. I don't think you even get a stress from Supernatural Reflexes if your boost and/or barrel roll is red. You're taking an action on the card not on your action bar when using Supernatural Reflexes.

40 minutes ago, Frimmel said:

When the S-foils are closed Luke has Boost on his action bar. When the s-foils are open Luke does not have Boost on his action bar. Closed s-foils Luke does not take a damage from using Supernatural Reflexes to boost. Open S-foils Luke takes a damage from using Supernatural Reflexes to boost.

The color of the action has no bearing on whether or not you take a damage from Supernatural Reflexes. I don't think you even get a stress from Supernatural Reflexes if your boost and/or barrel roll is red. You're taking an action on the card not on your action bar when using Supernatural Reflexes.

Correct. If a card instructs you to perform a specific action, that action is white unless the card says otherwise, or specifically says to use the action on your bar.