Ranran, who got lost in Cyber-space, obtained two types of cyber themes.
However, there are still some challenges to applying it in simutrans.

(1) The title bar is not beautifulCurrently the brightness of characters and background is automatically adjusted by gui_player_color_dark and gui_player_color_bright, but this is not enough. Especially on dark colored themes.
Because this is intended to invert the brightness. But with a dark theme it is not always correct.

I think the parameters related to the title bar and normal text brightness should be separated.
Ideally, we should have a color mask like for color buttons.
(2) Borders where theme can't specify a color will spoil the lookFor example, components such as progress bars, color boxes, and views have a two-color gray border.
I want you to be able to specify the color of these borders as well.
(3) Menu bar...The Menubar design depends on pakset and is separated from the theme. So it creates a contradiction with the theme design and creates a weird look. This fact shatters the minds of theme designers. (´・ω・`)
My suggestion is to separate the button background from the button icon.

The theme designs the foundation and pakset designs the objects.
I don't think the transition to this specification will cause any problems. Because all existing icons have the whole image.
Not only does this remove the contradiction, but it also improves the look somewhat by not stretching the background with large buttons.
(4) halttype symbolsThis also improves the appearance if you can design with the theme.
I know that the 192 comic has a sleekly designed halttype symbol, but pakset is just doing what the theme should support. For example, if you change to a high contrast theme, those symbols will create a design contradiction.
The following is a greedy request.
(5) Can you set the color of the white frame that appears when you press the button, or make it a different style?

Does not match the shape of the button (´・ω・`)