For those on PC, the most popular method for true "dark mode" textures is through and the AlphaConsole plugin. Dark Textures Tutorial for Rocket League
Disable these to remove the "bright white" glare from neon signs and sunbeams, which often washes out the screen.
You can achieve a darker, more stable visual experience without external mods by adjusting your :
While this adds darkness to corners where objects meet, turning it off can improve FPS.