Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: 2
Darker method: C
Equal score: -0.0793626175604
Darker point darker score: 0.928983736968
darker: 2 (eq: False, dd: True), confidence: 2, worker: A3PX16PNFHQ5OK
darker: 2 (eq: False, dd: True), confidence: 0, worker: A1SEDRJVSUM4NZ (marked invalid)
darker: 2 (eq: False, dd: True), confidence: 1, worker: A3JLJXKUPJX3J2
darker: 2 (eq: False, dd: True), confidence: 2, worker: A3UC4JITM1QD1M
darker: 2 (eq: False, dd: True), confidence: 1, worker: A3TO9R1Z7L6PZZ (marked invalid)
darker: E (eq: True, dd: None), confidence: 1, worker: A3LHITZX5D9J9A
darker: E (eq: True, dd: None), confidence: 2, worker: A1XVZCQ983ETMR
(0: guessing, 1: probably, 2: definitely)