shader_type canvas_item;

instance uniform vec3 fill_color : source_color;
instance uniform vec3 border_color : source_color;
instance uniform float border_width = 0.16;

void fragment() {
	if (min(UV.x, UV.y) < border_width || max(UV.x, UV.y) > 1.0 - border_width) {
		COLOR.rgb = border_color;
	} else {
		COLOR.rgb = fill_color;
	}
}