The following scenario explains how you can add colour to a Data Validation Dropdown list in an easy-to-follow, step-by-step guide. Data Validation can help to improve the accuracy of data entry within a given spreadsheet. It can cut down on typos by providing users with a dropdown list of correct values.
I want to colour code the list of Items shown in the diagram below (using either Red, Green or Blue).
First, I need to set up the Data Validation Dropdown list holding the values that I would like my users to choose from.

Then I need to add Conditional Formatting to the same range of cells that hold the Dropdown list. Depending on the value chosen from the list the cell will change to the appropriate colour.

e.g., Red

e.g., Green

e.g., Blue
The Font and Background colours have also been made the same.

Note: Once colour has been added you can use Excel to sort and filter by it. This gives you the option to organise your data in a variety of visually attractive ways, to make analysis more accessible and means important data will really stand out.
Related blogs
- How to Improve Your Excel Spreadsheets With Data Validation — An introduction to some of the basic uses of Data Validation.
- How to Make a Dynamic Data Validation Drop-Down List in Excel — Learn how to make dynamic data validation drop-down lists and extend the lists automatically when new data is entered.
- How to Use Conditional Formatting in Microsoft Excel — Learn how to use conditional formatting to analyse your data in this quick two-minute video guide.