Wall Color Sim

Overlays a translucent color on top of an uploaded room photo so you can preview how a paint color might look on the walls. You pick any image from your device, choose a color with the system color picker, and adjust the overlay opacity from 0 to 1 in 0.1 steps. The overlay is rendered as an absolutely-positioned layer covering the entire image with pointer-events disabled.

1. Click the file input at the top and choose an image file (any image/* type) from your device — the image is loaded via a local Object URL, so no upload occurs. 2. Use the color input to pick a paint color; the default is #E8E8E8. 3. Drag the Opacity slider between 0 and 1 (step 0.1) to control how strongly the tint shows over the photo. 4. The preview image with the overlay updates instantly as you change color or opacity.

The image is rendered inside a relatively-positioned container, and the tint is a single absolutely-positioned div with inset-0 that sits on top of the entire image. Its background-color is the chosen hex color and its opacity is the slider value, so the effect is a flat rectangle covering the whole frame — it does not detect walls, mask only wall areas, or apply perspective. Low opacity (around 0.2-0.4) tends to look more realistic for paint previews; full opacity simply floods the image with the chosen color.