1.
Go to sdcard/Android/data/com.jundroo.SimplePlanes

2.
Click Files.

3.
Click AircraftThemes.xml, Locate Ortho Then Copy.

4.
Click Close.

5.
Click Aircraft Designs, Then Locate Your Airplane.

6.
Open it, Then Locate The Text: theme="Example"

7.
Delete The Text Example Then Paste Ortho

8.
Click Save Then Close

@Lanzwillan oh, sorry my dude.
Thanks @Tully2001
@DerekSP Yeah we Can Use Custom, But it's Harder Than This.
Or just use Custom eh?
Np comrade. @Lanzwillan
Thanks @Strikefighter04
@ballisticbullets i Know.
well, ortho is the paint used for making the online blueprints of the plane you will see in the bottom of a post next to the characteristics. it is a very flat grey, but some cockpits are blue.
Thanks @Carsong1017
Thanks For The Upvotes @chancey21 And @SSSvaSSa