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Are there specifications for Crewed mission spacecrafts in terms of interior and exterior paint colours? I.e. Only specific paint colours are required internally and externally.

Can these paint colours be changed as part of maintenance and renovation methods with time period?

Example : ISS.

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    $\begingroup$ Cannot answer for specifications but would take it as given that they do not repaint the interior at all due to the impact of the fumes on life support. $\endgroup$ Apr 16 at 1:22
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    $\begingroup$ To use liquid paints in zero gravity might be a bad idea. To use paints with other solvents than water that may be harmful to the human body should be avoid in the atmosphere of the ISS. Using the paints on Earth is a very different thing. $\endgroup$
    – Uwe
    Apr 16 at 17:43

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Yes, there's a spec for that. ;-) There are specs for everything!

I was never directly involved with manned space mission flight deck equipment but I've "painted" flight decks for Boeing, Bombardier, Airbus, Embraer, Cessna. I did the mechanical engineering of control panels for aircraft which involved defining to vendors the finishes on the equipment in accordance with the customer specifications. Various customers have craft specific color schemes, level of gloss, degree of surface durability and materials safety. A great deal of human factors engineering goes into finishes and colors. Everything is tightly controlled and specified.

It is inconceivable to me that the interiors of manned missions are not tightly defined. It is also inconceivable to me that repainting during mission could be allowed.

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Are there specifications for Crewed mission spacecrafts in terms of interior and exterior paint colours?

Yes, as in the other answer, space bound equipment is a tightly controlled project with thousands of specifications for each and every aspect.

I also encountered literal 'bibles' when it came to aeronautical visual/aesthetic aspects and the space industry is no different.

For the Soviet, and then the Russian, space program, again there were specifications for everything. But when it came to interiors, for a little while they had a female architect that created some of the aesthetic aspects inside the crewed spacecraft Soyuz, and space stations Salyut and Mir, whilst also working on their space shuttle Buran:

https://www.wallpaper.com/lifestyle/soviet-space-programme-philipp-meuser-lifts-the-lid-on-the-seminal-cosmic-design-of-galina-balashova

The Soviet Architect Who Drafted the Space Race

https://www.vice.com/en/article/ae3beg/the-soviet-architect-who-drafted-the-space-race

forgotten architect of the Soviet space programme, the woman who designed the inside of space capsules.

http://kvadratinterwoven.com/out-of-this-world-the-space-age-designs-of-galina-balashova

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Above: Interior design, with color specifications for the Mir space station, 1980.

“As a human, you are always looking for orientation in space. You need a top, bottom and wall.” Balashova’s solution? “She colour-coded – green floor, blue-grey ceiling, walls in a light yellow”

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Above: Soyuz interior color concept in 1963.

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Mir interior design color scheme work, 1976-1980.

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Color specs, interior artificial leather, 1976.

(Interestingly, she also produced watercolor paintings for each space station to 'hang' in the cabins, to make it more like a living room)

Externally, the Soviets had a little variation too, with two of their space stations:

enter image description here

Salyut 7 at left and Salyut 6. Reason being was that for a few months both stations were in orbit at the same time, so they needed to color-differentiate between them (During initial construction, Salyut 7 was color-coded the same as 6, being its backup as was standard during the Soviet space program).

Can these paint colours be changed as part of maintenance and renovation methods with time period?

No. As others have said, it is impractical.

If the paint color of something were to change it would be because that piece of equipment, etc, was changed or replaced.

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    $\begingroup$ are you any relation to Boaty McBoatface ? ;-) $\endgroup$
    – BradV
    Apr 16 at 17:25
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    $\begingroup$ What a fascinating answer! That pallet certainly screams "soviet space program", although I never would have been able to say why. Amazing that such a substantial portion of the Soviet Roscosmos aesthetic was the work of a single woman. $\endgroup$ Apr 16 at 19:17

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