My wife has an entire blog of them:
https://lockdowntransmissions.wordpress.com/2022/01/03/the-c... ; my faves of that list are
The Silencers (Dean Martin does a Bond spoof), and
Robo-Vampire (low budget knockoff Robocop fights Chinese vampires, incredible nonsense ensues)
I'd add Theater of Blood (Vincent Price thespian camp horror with a large number of cameos from British character actors of the 1970s), Tomorrow I’ll Wake Up And Scald Myself With Tea (Soviet time-travel twin-swap comedy), and White Sun Of The Desert, which is traditionally watched by astronauts in their last night of pre-launch quarantine at Baikonur. https://24htech.asia/i-was-bored-so-i-watched-the-movie-that... ; that has some legitimately great shots in it.
To the original question, if you like technicolor you owe it to yourself to see Singin' In The Rain, not just for the title dance sequence but several other big numbers.