color qualifier examples found with this query:

• {{#invoke:Sandbox/Marsupium/Technique|get_medium|item=Q3647650}} →
  white marbleCategory:Pages with complex technique templates 
• {{#invoke:Sandbox/Marsupium/Technique|get_medium|item=Q60687887}} →
  black graniteCategory:Pages with complex technique templates 
• {{#invoke:Sandbox/Marsupium/Technique|get_medium|item=Q106779411}} →
  red, black and white pastelCategory:Pages with complex technique templates 
• {{#invoke:Sandbox/Marsupium/Technique|get_medium|item=Q254794}} →
  watercolor paint, Q1182043 and top color on paperCategory:Pages with complex technique templates 
• {{#invoke:Sandbox/Marsupium/Technique|get_medium|item=Q254794|lang=en}} →
  watercolor paint, Q1182043 and top color on paperCategory:Pages with complex technique templates 

• >1 color, found with this query:

  SELECT DISTINCT ?item ?value ?valueLabel (COUNT(?color) AS ?colorNum) ?instance_of ?instance_ofLabel ?image WHERE {
    ?item p:P186 ?st.
    ?st ps:P186 ?value;
      pq:P462 ?color.
  #  ?item wdt:P31 wd:Q860861. # wd:Q3305213.
    OPTIONAL { ?item wdt:P31 ?instance_of. }
    OPTIONAL { ?item wdt:P18 ?image. }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }
  GROUP BY ?item ?itemLabel ?value ?valueLabel ?instance_of ?instance_ofLabel ?image
  ORDER BY DESC (?colorNum)
  #LIMIT 10000
  

  Try it!
  • {{#invoke:Sandbox/Marsupium/Technique|get_medium|item=Q3220400}} →
    epoxy resins and white, blue, black and red polyurethaneCategory:Pages with complex technique templates 
  • {{#invoke:Sandbox/Marsupium/Technique|get_medium|item=Q3220400|lang=de}} →
    Epoxidharz und weißes, blaues, schwarzes und rotes PolyurethanCategory:Pages with complex technique templates 
  • {{#invoke:Sandbox/Marsupium/Technique|get_medium|item=Q3220400|lang=fr}} →
    époxy et polyuréthane blanc, bleu, noir et rougeCategory:Pages with complex technique templates 
• {{#invoke:Sandbox/Marsupium/Technique|get_medium|item=Q50345879|lang=en}} →
  acrylic on boardCategory:Pages with complex technique templates