---
title: "Select a color for transparency | Guides | Map tiling hosting | Data processing"
description: "Set specific map colors as fully transparent during rendering."
---

> For AI agents: a documentation index is available at [/llms.txt](https://docs.maptiler.com/llms.txt). Markdown versions of all pages are available by appending .md to any URL.

# Select a color for transparency

Transparency can _switch off_ any color from the original image on the final map. This option is typically used to eliminate the borders of multiple map sheets stitched together. You can set a specific color of the map to be considered fully transparent during rendering.

## Select a color

This feature is available in a Transparency combo box on the right side of the input page.

![pick\_a\_color\_1.png](./10414908952337_4e9e53fcef.webp)

Now you can choose a color from the palette, or define your own color in the color mixer, or enter a HEX color code. In the images below you can see the edges of the output without using the transparency color (left) and after setting a white color (#FFFFFF) to transparency (right).

<table><tbody><tr><td><img src="./output-no-trans_3b30e8c22e.webp" alt="output-no-trans.png" width="714" height="587" data-aspect-ratio="1.22"></td><td><img src="./color-transparency_8f340dd39a.webp" alt="color-transparency.png" width="693" height="583" data-aspect-ratio="1.19"></td></tr></tbody></table>

If you select the **“Ignore alpha band”**, the alpha channel from your input images will be ignored.

## Useful links

[How to overlay an image over a map](https://docs.maptiler.com/guides/map-tiling-hosting/data-processing/how-to-create-tiles-from-raster-data)  
[Raster profile - turn images into zoomable raster tiles](https://docs.maptiler.com/guides/map-tiling-hosting/data-processing/raster-profile-convert-your-images-into-zoomable-raster-tiles)