> For the complete documentation index, see [llms.txt](https://docs.flatredball.com/gum/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flatredball.com/gum/code/standard-visuals/coloredrectangleruntime.md).

# ColoredRectangleRuntime

{% hint style="info" %}
ColoredRectangleRuntime is the legacy solid-color rectangle. New Gum projects (version 3 and later) seed the **Rectangle** standard instead, which is backed by [RectangleRuntime](/gum/code/standard-visuals/rectangleruntime.md). RectangleRuntime renders fill, outline (stroke), gradients, and drop shadows, so prefer it for new code. ColoredRectangleRuntime remains fully supported for existing projects.
{% endhint %}

### Introduction

The ColoredRectangleRuntime is a visual object which displays a solid-color rectangle. It can be used to display solid colors, but can also display gradients.

ColoredRectangleRuntime is often used as a colored background or a health bar.

### Code Example

The following code creates a ColoredRectangleRuntime:

```csharp
var coloredRectangleRuntime = new ColoredRectangleRuntime();
coloredRectangleRuntime.Color = Color.White;
coloredRectangleRuntime.Width = 100;
coloredRectangleRuntime.Height = 100;
coloredRectangleRuntime.AddToManagers();
```

The output is a white rectangle:


---

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