Event Color

API: onBeforeEventRender.

Use onBeforeEventRender to set colors on args.data. The examples give Planning a blue background, white text and a darker duration bar; events that do not match the ID condition keep their theme colors.

The framework examples use DayPilot Pro. For installation, see the Angular, React or Vue Scheduler guide.

Angular

import {Component} from "@angular/core";
import {DayPilot, DayPilotModule} from "daypilot-pro-angular";

@Component({
  selector: "app-scheduler-example",
  standalone: true,
  imports: [DayPilotModule],
  template: `
    
    <daypilot-scheduler [config]="config"></daypilot-scheduler>
  `
})
export class SchedulerExampleComponent {
  config: DayPilot.SchedulerConfig = {
    startDate: "2026-11-01",
    days: 30,
    scale: "Day",
    timeHeaders: [{groupBy: "Month"}, {groupBy: "Day", format: "d"}],
    resources: [{id: "A", name: "Room A"}, {id: "B", name: "Room B"}],
    events: [{id: 1, text: "Planning", resource: "A", start: "2026-11-03", end: "2026-11-06"}, {id: 2, text: "Delivery", resource: "B", start: "2026-11-08", end: "2026-11-11"}],
    onBeforeEventRender: args => { if (args.data.id === 1) { args.data.backColor = "#2563eb"; args.data.fontColor = "#ffffff"; args.data.barColor = "#1e40af"; } }
  };

}

React

import React from "react";
import {DayPilot, DayPilotScheduler} from "daypilot-pro-react";

export default function SchedulerExample() {

  return <div>

    <DayPilotScheduler
      startDate={"2026-11-01"}
      days={30}
      scale={"Day"}
      timeHeaders={[{groupBy: "Month"}, {groupBy: "Day", format: "d"}]}
      resources={[{id: "A", name: "Room A"}, {id: "B", name: "Room B"}]}
      events={[{id: 1, text: "Planning", resource: "A", start: "2026-11-03", end: "2026-11-06"}, {id: 2, text: "Delivery", resource: "B", start: "2026-11-08", end: "2026-11-11"}]}
      onBeforeEventRender={args => { if (args.data.id === 1) { args.data.backColor = "#2563eb"; args.data.fontColor = "#ffffff"; args.data.barColor = "#1e40af"; } }}
    />
  </div>;
}

Vue

<script setup>
import {DayPilot, DayPilotScheduler} from "daypilot-pro-vue";

const startDate = "2026-11-01";
const days = 30;
const scale = "Day";
const timeHeaders = [{groupBy: "Month"}, {groupBy: "Day", format: "d"}];
const resources = [{id: "A", name: "Room A"}, {id: "B", name: "Room B"}];
const events = [{id: 1, text: "Planning", resource: "A", start: "2026-11-03", end: "2026-11-06"}, {id: 2, text: "Delivery", resource: "B", start: "2026-11-08", end: "2026-11-11"}];
const onBeforeEventRender = args => { if (args.data.id === 1) { args.data.backColor = "#2563eb"; args.data.fontColor = "#ffffff"; args.data.barColor = "#1e40af"; } };

</script>

<template>
  <div>

    <DayPilotScheduler
      :startDate="startDate"
      :days="days"
      :scale="scale"
      :timeHeaders="timeHeaders"
      :resources="resources"
      :events="events"
      :onBeforeEventRender="onBeforeEventRender"
    />
  </div>
</template>

JavaScript

Add backColor property to DayPilot.Event.data:

<div id="dp"></div>
<script type="text/javascript">
  var dp = new DayPilot.Scheduler("dp");
  dp.events.list = [
    {
      start: "2013-03-25T00:00:00",
      end: "2013-03-25T12:00:00",
      id: "123",
      resource: "A",
      text: "Event",
      backColor: "#cccccc"
    }
  ]
  // ...
  dp.init();
</script>

protected void DayPilotScheduler1_BeforeEventRender(object sender, BeforeEventRenderEventArgs e)
{
  // this assumes your event object in Events collection has "color" field or property
  e.BackgroundColor = (string) e.DataItem["color"]; 
}

protected override void OnBeforeEventRender(BeforeEventRenderArgs e)
{
  // this assumes your event object in Events collection has "color" field or property
  e.BackgroundColor = (string) e.DataItem["color"]; 
}