Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: 2
Darker method: C
Equal score: -0.0308365699559
Darker point darker score: 0.995235612879
darker: 2 (eq: False, dd: True), confidence: 1, worker: A3TO9R1Z7L6PZZ (marked invalid)
darker: 2 (eq: False, dd: True), confidence: 2, worker: A237FGJCPV99GJ
darker: 2 (eq: False, dd: True), confidence: 0, worker: AT9VZ94CAWNG
darker: E (eq: True, dd: None), confidence: 1, worker: A1GM94HPPS4SS0
darker: 2 (eq: False, dd: True), confidence: 1, worker: A2SNX0RFIPIO60
(0: guessing, 1: probably, 2: definitely)