Currently, GMB Rank Tracker uses only three colours (red, green, and yellow) to represent ranking.
Introduce different shades of the three colours to represent the "intensity of the ranking".
A darker shade is the best in that colour category.
For e.g,
Position 1: dark green
Position 2: mid green
Position 3: light green
Apply these dark, mid & light shades to the three primary colours.
Different shades of colour are much easier to pick up visually than a sea of numbers identified only by three solid colours.
The attached image shows what another rank tracker does.
P.S. Please retain the ranking numbers.