Composite RCA is red/white/yellow.
Component is RGB+Red/White.
I could get an adapter for that
I would feel stupid if i had a Yellow RCA -> HDMI adapter chain.
It would be like using a 1/8" - 1/4" adapter, and then a 1/4" - balanced XLR input so you could plug in your $400 studio condenser mic to do commentary for a lets play.
Massive Overkill, and the quality would be restricted by the input/ouput anyways.