Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: 2
Darker method: C
Equal score: -0.0734691126058
Darker point darker score: 0.160236018733
darker: 2 (eq: False, dd: True), confidence: 1, worker: A2925T8JYCYNN3 (marked invalid)
darker: 1 (eq: False, dd: False), confidence: 1, worker: A3LNPBZXHKKAA7
darker: 2 (eq: False, dd: True), confidence: 2, worker: A2CXAWVGQ6QQ2V
darker: E (eq: True, dd: None), confidence: 2, worker: AHLVAVDNE9WI0
darker: 2 (eq: False, dd: True), confidence: 2, worker: A2VVSQ1PSXKGVE
darker: E (eq: True, dd: None), confidence: 2, worker: A3FVPDNQQLDFZH
(0: guessing, 1: probably, 2: definitely)