Question: what is the color code for type k copper
[{'answer': 'green', 'provenance': [{'wikipedia_id': '30421363', 'title': 'Copper tubing', 'start_paragraph_id': 18, 'start_character': 329, 'end_paragraph_id': 18, 'end_character': 334, 'bleu_score': 1.0, 'section': 'Section::::Sizes.:United States, Canada and India.\n'}]}, {'provenance': [{'wikipedia_id': '30421363', 'title': 'Copper tubing', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 351, 'bleu_score': 0.963949056609222, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10773814962381361114}, 'section': 'Section::::Sizes.:United States, Canada and India.\n'}]}]