Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: 2
Darker method: C
Equal score: -1.18863619384
Darker point darker score: 0.0173083668858
darker: 2 (eq: False, dd: True), confidence: 2, worker: A2FNC7KTCBF9IT
darker: 2 (eq: False, dd: True), confidence: 2, worker: A1R2MU0C4REIEF
darker: 2 (eq: False, dd: True), confidence: 2, worker: A2TE84RMBCJ1B1 (marked invalid)
darker: 1 (eq: False, dd: False), confidence: 2, worker: A1JEDFDBWHLA1F
darker: 1 (eq: False, dd: False), confidence: 0, worker: A234WZ4KX8IW07
darker: E (eq: True, dd: None), confidence: 2, worker: A3Q9S2K93W2KDI (marked invalid)
darker: 2 (eq: False, dd: True), confidence: 2, worker: A90QPQO48C6RX
(0: guessing, 1: probably, 2: definitely)