Aphids come in many colors.

If they are tan & resemble small papery blimps stuck to the leaf, biological control is active at your place.

they do look little little blimps!

what does that mean that biological control is active at my place?
that sounds like a good thing.
So the tan things (what are they?) are good bugs eating the bad ones?

A good guy (actually, girl) laid a single egg in each aphid. The egg hatched inside the aphid, the larva (youngster) ate until fully developed, then left the comforts of a well-protected "home." In the final stage, you can see the small round exit hole at the end of the aphid.

Does it make sense to buy ladybugs? You can buy them at garden centers.