Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: 2
Darker method: C
Equal score: -0.210353568241
Darker point darker score: 1.05165141493
darker: 2 (eq: False, dd: True), confidence: 2, worker: A3SOJXAUQE15S3
darker: 2 (eq: False, dd: True), confidence: 2, worker: A3ICG6AUFB4AT
darker: 1 (eq: False, dd: False), confidence: 2, worker: A2RUHINET2E1C5 (marked invalid)
darker: E (eq: True, dd: None), confidence: 1, worker: A1NPKI9KKWOI2P
darker: 2 (eq: False, dd: True), confidence: 1, worker: A1JEDFDBWHLA1F
darker: 2 (eq: False, dd: True), confidence: 2, worker: A2YYHNACJ8MFTU
darker: E (eq: True, dd: None), confidence: 2, worker: A3Q9S2K93W2KDI (marked invalid)
(0: guessing, 1: probably, 2: definitely)