Having tools in matching colours is definitely a sign of youth.
As you get older and lose some, lend some (and the a-hole doesn't return them - yes I'm talking about you John Ponder) then you get some replacements that don't match. Eventually after many years you have an eclectic mix.

How are you on collecting random nuts and screws that might just come in handy one day? That is the true art of the cave.

https://daily-twerk.com/general/bloke-finally-finds-a-use-for-a-nut-and-bolt-from-his-collection/