Erase a flat or gradient background, pixel-perfect.

Erase a background by colour — when the foreground is worth protecting

There are two ways to take a background out of an image, and they are not interchangeable. One reasons about the picture and guesses where the subject ends; the other never guesses — it targets a colour and clears it, leaving everything of a different colour untouched. This tool is the second kind, a deterministic colour eraser, and it shines exactly where the "smart" approach struggles: flat and gradient backgrounds behind detailed foregrounds.

Color erase vs AI cutout: two different jobs

The AI background remover looks at a photo, estimates where the subject ends, and cuts along that estimate. It is excellent on a portrait or a product against a busy scene — but "estimate" is the operative word, and it can shave a fiddly edge or leave a faint halo. Colour erase works the opposite way: it samples the background colour from the edges you say the background touches, then clears only the pixels that connect back to that colour within your tolerance. Anything a different colour is never touched, so thin detail — blades of grass, foliage, a wiry logo, small text — comes through exactly as drawn.

When color erase wins

Reach for colour erase whenever the background is one flat area or a smooth gradient and the subject is clearly a different colour. That covers a lot of everyday work:

• Flat studio and white backgrounds — products on seamless paper, where the AI cut-out risks nibbling the edges.
• Logos and flat graphics — a mark on a solid fill lifted off cleanly, every corner and thin stroke intact.
• Screenshots — an icon, badge or UI element pulled off its canvas without a halo.
• Solid-colour product shots — anything shot against a single backdrop colour that contrasts with the item.

Because the result is deterministic, the same settings give the same cut on every similar image — dependable across a whole batch, not a one-off lucky guess.

Tuning the tolerance

The tolerance is the one control you will actually adjust. It sets how far a pixel's colour may drift from the sampled background and still count as background. Too low and a thin rim of near-background pixels survives around the subject — the pale fringe you see on a bad cut-out. Too high and the fill treats parts of the subject as background, eating into edges that sit close in colour. Nudge the slider while watching the preview: raise it until the last of the background clears, then ease off the moment the subject starts to erode. It also helps to pick only the edges the background touches — the top alone for a sky-above layer, others when it wraps around.

Gradients and near-solid backgrounds

A single flat colour is the easy case; a graded sky or a soft vignette is where a naive colour key falls apart, because every row is a slightly different shade. This eraser grows outward from the seeded edge one neighbour at a time, only crossing between pixels whose colours are within a small local step. That lets it flow down a smooth gradient — following a sky from pale to deep — while stopping dead at the crisp edge of the foreground. Near-solid backgrounds with faint noise or JPEG speckle behave the same. When you are happy, keep the result transparent or flatten it onto white, studio grey or black, and export a compact WebP or a lossless PNG.

When to switch to the AI cutout instead

Colour erase has one hard limit: the background and the foreground have to be genuinely different colours. The moment the background is a photograph — a room, a street, foliage behind your subject — there is no single colour to sample and the fill has nothing clean to follow. Fine hair is the other classic case: thousands of semi-transparent strands blend into the background, so any tolerance high enough to clear between them also eats the hair. Those are the jobs the AI cut-out was built for, reasoning about the subject rather than chasing a colour. A rule of thumb: if the background is "a colour", erase it here; if it is "a scene", cut it out there.

Either way you end up with a transparent image you can drop into a design, slide or store listing. For the full walkthrough — formats, flattening onto a backdrop, and where transparency tends to break — read our guide to making a transparent PNG.