Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: 2
Darker method: C
Equal score: -0.116740215278
Darker point darker score: -0.100491676159
darker: 1 (eq: False, dd: True), confidence: 2, worker: A3JSQQSFSORW59 (marked invalid)
darker: 1 (eq: False, dd: True), confidence: 2, worker: A1AXIY3LLO186R
darker: 2 (eq: False, dd: False), confidence: 2, worker: A1NZVXB0S8DR04
darker: 2 (eq: False, dd: False), confidence: 2, worker: A237FGJCPV99GJ
darker: 1 (eq: False, dd: True), confidence: 2, worker: A39SAJGZKMYJE9 (marked invalid)
darker: E (eq: True, dd: None), confidence: 0, worker: A3UC4JITM1QD1M
darker: 2 (eq: False, dd: False), confidence: 1, worker: A1NM7ZPZ3NH412
(0: guessing, 1: probably, 2: definitely)