Red point: darker
Green point: lighter
Blue point: equal
Darker point: 1
Darker reflectance: 2
Darker method: C
Equal score: -0.8798625231
Darker point darker score: -1.0449868135
darker: 2 (eq: False, dd: False), confidence: 1, worker: A2DTELFC4X0QJQ
darker: 2 (eq: False, dd: False), confidence: 1, worker: A3HPVFAF1U9WXK
darker: 2 (eq: False, dd: False), confidence: 2, worker: A14BFNH96MJQH
darker: 2 (eq: False, dd: False), confidence: 2, worker: A5R9TAN5DI19I (marked invalid)
darker: 2 (eq: False, dd: False), confidence: 2, worker: A32M5FDKCPHMA
darker: 2 (eq: False, dd: False), confidence: 2, worker: A1NX9Q0EAOPYN3
darker: E (eq: True, dd: None), confidence: 2, worker: A2RUHINET2E1C5 (marked invalid)
(0: guessing, 1: probably, 2: definitely)