This browser-based utility replaces any color in a PNG (Portable Network Graphics) picture with a new color. For example, you can quickly swap red with blue, or yellow with white. You can also match similar color tones. For example, you can match 10% of possible green colors, which include sea green, jungle green, and forest green. The color for the replacement can be specified in the options as a color name, color code, or rgb(r,g,b) function, or you can select it directly from the input image by clicking on a color pixel in the input PNG. All pixels of the selected color are immediately replaced with the new color and you can see the effect in the output preview field. If the similar color match option is set to a value that's greater than 0%, then not only the indicated color is replaced, but also its shades and tones. To preserve tints, shadows, and gradients in the output PNG, you can activate the "Preserve Color Shades" option. It looks at the lightness parameter (geek note: that's "L" in "HSL") of the original pixels and sets the same lightness for the pixels of the new color. Often, pixels of the original color pixels still remain on the border or at the edge of old and new colors. To get rid of these pixels, you can use the edge smoothing option, which mixes the colors of the old and new pixels, making a smooth transition between colors. Also, for your convenience, we've added the preview mask option. If enabled, it will show exactly which colors in the input PNG got matched. Png-abulous!