Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: 2
Darker method: C
Equal score: -0.907363144732
Darker point darker score: 0.329332830146
darker: 2 (eq: False, dd: True), confidence: 2, worker: A7PVOM63I6UH5 (marked invalid)
darker: 2 (eq: False, dd: True), confidence: 2, worker: A2YUKCBFNE5RGL
darker: 2 (eq: False, dd: True), confidence: 2, worker: A168LFJNV9DSTS
darker: 1 (eq: False, dd: False), confidence: 2, worker: A3VLWJYR99R66D
darker: 2 (eq: False, dd: True), confidence: 2, worker: A1NJB5LJJPC7AS
darker: 2 (eq: False, dd: True), confidence: 0, worker: A3P8OM5PDCFZNE
(0: guessing, 1: probably, 2: definitely)