"使呈现暗色轮廓" can be translated as "to create or render a dark silhouette" or "to give something a dark outline" in English, depending on the specific context and intended nuance.
"To create or render a dark silhouette" emphasizes the act of producing or depicting a shape in dark tones, often against a lighter background.
"To give something a dark outline" focuses more on the effect of adding a dark border or edge to an object or shape.