Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: 2
Darker method: C
Equal score: -0.010539738284
Darker point darker score: -0.12746251474
darker: 1 (eq: False, dd: True), confidence: 2, worker: A1GM94HPPS4SS0
darker: 2 (eq: False, dd: False), confidence: 1, worker: A2D3TM156X7Y61
darker: E (eq: True, dd: None), confidence: 0, worker: AS6P7YSSJR79B (marked invalid)
darker: E (eq: True, dd: None), confidence: 0, worker: A2JVJ7J2MVGW9S
darker: E (eq: True, dd: None), confidence: 2, worker: A3P8OM5PDCFZNE
darker: 2 (eq: False, dd: False), confidence: 2, worker: A1JHVZIC3FH9LG
(0: guessing, 1: probably, 2: definitely)