How to Change a Photo Background Color Online (Red / Blue / White)

Remove image backgrounds and swap background colors with Koutuxia. Powered by the BiRefNet model, export transparent PNGs or red, blue, or white solid backgrounds in seconds — free to use.

A plain, evenly-lit backdrop makes a portrait read as deliberate rather than snapped in a hallway. You don't need a studio for it — remove the original background with Koutuxia, then put the cutout on whatever solid color you want.

How to recolor

Step 1 · Remove the original background

Drop your photo into Koutuxia. AI cuts out the person, background goes transparent. Use Fine mode for cleaner hair edges.

Step 2 · Download transparent PNG

Download the cutout. Your portrait now floats on transparency, ready to drop onto any color.

Step 3 · Add a solid color

In any image tool (even slides), create a red/blue/white background, place the PNG on top, and export.

Picking a background color

·White: the safe default — neutral, prints cleanly, works anywhere
·Blue: softer than white, keeps dark hair and dark clothing from merging into the edge
·Red: high contrast, useful when the shot needs to stand out in a grid
·Note: you can also swap attire after the cutout, but that needs a separate tool

FAQ

Can Koutuxia output a red/blue background directly?

Koutuxia handles the hard part — removing the original background cleanly. Adding a solid color is trivial in any image tool. Built-in recoloring is on our roadmap.

Will it shave off the hair?

Use Fine (BiRefNet) mode — hair-edge handling is first-tier. Evenly-lit photos with simple backgrounds work best.

Is it free?

5/day anonymous, 20/day signed-in. Free.

Does it work on mobile?

Yes. Open koutuxia.com in your phone browser, drag or pick a photo.

Remove the background first

Upload your photo, AI cuts it in seconds, then recolor.

Remove background free