Gray/Anthracite-colored windows - the new "white"?

The advantage of dark roofs is that the solar thermal modules are not so unpleasantly noticeable.

The trend toward heat pumps also "fuels" the trend toward photovoltaic systems, and these simply fit better with dark roofs than with red ones.

Sure, it could fail to appear. Photovoltaics do indeed look better on a dark roof, but only the modules without bulky aluminum frames.

Now I wonder whether I should invest in the production of frameless red photovoltaic modules after all. They have about 15% less efficiency and cost a bit more to produce. Shades of red would not be easily adjustable, so one would have to see which roof tiles they could be made color-compatible with. Who has a red roof and some spare cash to join in?

White is timeless.

Timeless in the fashion-historical sense, yes; timeless in the sense of long-term attractiveness, unfortunately rather not.

but hope that solar modules will soon also be offered in other colors.

Color is related to the wavelength of light and therefore also to efficiency and operational range in everything related to solar. And solar modules, similar to those for photovoltaics, are primarily technical components, less design-optimized.

Windows (plastic / aluminum) Internorm KF410 outside RAL 9007 / gray aluminum, inside white. Doors (Köster) and blinds (Warema) in RAL 9007 / gray aluminum Facade white plaster Roof covering black clay tiles (Erlus)

Now I am wondering whether I should invest in the production of frameless red photovoltaic modules after all. ...

There are roof tiles (also in red:cool with integrated, barely visible photovoltaics (Nelskamp and others) Unfortunately significantly more expensive and also less efficient since the usable area is smaller ...

maybe it will be possible to
put the red roof on the photovoltaic system,
to signal to even the last neighbor that one is eco and environmentally friendly,
the diesel is in the locked garage after all

RAL 9007 is great, we also use it for door frames, garage doors, and [Raffstore], respectively [Rollladen].