Most screen shots show borders around the screen, which is a feature of the VIC-II chip. By utilising interrupts to reset various hardware registers on precise timings it was possible to place graphics within the borders and thus utilise the full screen.
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The PAL color palette of the C64 differs significantly from the NTSC one [https://x.com/jscastro76/status/1820876067441123706 Source1] [https://x.com/vmisev/status/1664621460642471936 Source2] [https://x.com/vmisev/status/1642238897135529984 Source3]. It is often described as "brownish".Thanks to Tramiel decision to save 1¢ and not to change couple of transistors for the PAL C64. [https://x.com/vmisev/status/1638903342574235649 Source]
<gallery>
File:VICE NTSC palette.png|VICE NTSC palette
File:VICE PAL palette.png|VICE PAL palette
File:C64 PAL vs NTSC palette.png|C64 PAL vs NTSC palette
</gallery>