src/main/java/com/uploadcare/urls/CdnPathBuilder.java
public CdnPathBuilder cropColor(int width, int height, Color color) {
        dimensionsGuard(width, height);
        sb.append("/-/crop/")
                .append(width)
                .append("x")
                .append(height)
                .append("/")
                .append(colorToHex(color));
        return this;
    }
public CdnPathBuilder cropColor(int width, int height, Color color) {
        dimensionsGuard(width, height);
        sb.append("/-/crop/")
                .append(width)
                .append("x")
                .append(height)
                .append("/")
                .append(colorToHex(color));
        return this;
    }
Adds top-left-aligned crop with a filled background.

@param width Crop width
@param height Crop height
@param color Background color