Background Header and Content?

I need to change the color of the toolbar in the header and the background of the document, but I couldn’t find how to change it

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there are some buttons that I can’t change the color, the pdf.js put inline style

type: ‘toolButton’,
toolName: ‘AnnotationCreateDistanceMeasurement’

<button class="Button tool-button hasStyles" data-element="ellipseMeasurementToolButton" aria-label="Medição de área"><div class="Icon " style="color: rgb(228, 66, 52);">.....</div></button>

Hey there,

In the future please fill out the issue template correctly, or your post will be closed and deleted with no reply.

You can provide a custom CSS file - see this guide

Here’s an example of some CSS to get you started:

.Button .Icon {
  color: red;

.Button {
  background-color: green;

.DocumentContainer {
  background-color: blueviolet;

.HeaderItems {
  background-color: pink;

.Header.Tools .HeaderItems {
  background-color: yellow;