Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: 2
Darker method: C
Equal score: -0.220802579267
Darker point darker score: -0.0285375807251
darker: 1 (eq: False, dd: True), confidence: 1, worker: A1TKGFJSMVR2RP
darker: 2 (eq: False, dd: False), confidence: 2, worker: A3HH4LW4MMVHE1
darker: 1 (eq: False, dd: True), confidence: 2, worker: A3TO9R1Z7L6PZZ (marked invalid)
darker: 2 (eq: False, dd: False), confidence: 2, worker: A1NX9Q0EAOPYN3
darker: E (eq: True, dd: None), confidence: 2, worker: A2YYHNACJ8MFTU
darker: 2 (eq: False, dd: False), confidence: 2, worker: ADPVKKFJ886DJ
darker: 1 (eq: False, dd: True), confidence: 2, worker: A2EY9GDVA7L8YM (marked invalid)
darker: 2 (eq: False, dd: False), confidence: 2, worker: A2Q5IX1YGGLQML (marked invalid)
(0: guessing, 1: probably, 2: definitely)