To change colors in your project follow the below steps.
Step 1: Login into Mobiconnect with your Owner/Admin credential and select your project.
Step 2: Click on the User profile icon and click on the settings icon.
Step 3: Navigate to the Branding section.
Step 4: You can change the color by clicking on the color boxes.
If you want to change the menu color then update the menu solid color
Or If you want to change the color of all buttons or fields of the project then update the primary color.
Step 5: After selecting the colors, click on the Update button.
If you enable Use Gradient for the menu then you can apply two colors on the menu and header.