The theme editor allows you to customize the overall background color for your widgets. Here's a typical widget styled using the the theme editor only: Change Title Font Properties If you just want to change the widget title's font size, color, or weight (how bold it is), apply CSS like this (setting your own specific colors, sizes, weights): header.widget-header h3 { color: #4d709f; font-weight:400; font-size:1.1rem; } Note that you should be using REM units for font size, not pixels. That...