Color Scale Format in Excel
A color scale in Excel Conditional Formatting is a gradient that colors cells based on their values. The color intensity (or hue) reflects the relative value within the selected range, creating a visual scale.
How to apply:
Select the range.
Home > Conditional Formatting > Color Scales.

In this format it displays a two or three color gradient in a range of cells. The shade of the color represents the value in the cell.
Green-Yellow-Red color Scale

Red-Yellow-Green color Scale

Blue-Yellow-Red color Scale

Red-Yellow-Blue color Scale

Yellow-Red color Scale

Red-Yellow color Scale

Green-Yellow color Scale

Yellow-Green color Scale

Click on below link to get further information-
https://olivaa.odoo.com/blog/excel-5/icon-sets-in-excel-for-dashboards-89