@Mary14 , sorry for not interpreting your question correctly.
I do not know what the selection criteria is for the color of the hand being displayed by the count. I'm assuming that the Zoom program does not do an analysis of the received items to show a "majority shown" hand color, and probably uses the generic "off yellow" default hand color (the white hand is a lot more white). Here are the selections from the Reaction's Skin Tone selection:

You might consider making a Feature Request that the hosts' own selection of hand color be used in the tally area... that might be a relatively simple change to make; analyzing the make-up of the received Reactions would be a lot more difficult.
Feature Requests are made here: https://www.zoom.us/feed