Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: 1
Darker method: C
Equal score: -1.05774392784
Darker point darker score: -0.949793649754
darker: 2 (eq: False, dd: True), confidence: 1, worker: A2H4ON6BUHMY1L (marked invalid)
darker: 1 (eq: False, dd: False), confidence: 0, worker: A2YAM0NOL7EQNG
darker: E (eq: True, dd: None), confidence: 2, worker: A1WVOW92WZG8HP (marked invalid)
darker: 1 (eq: False, dd: False), confidence: 2, worker: A3R5MEKMYYM2JX
darker: 1 (eq: False, dd: False), confidence: 2, worker: A2P3JDCCY0EH5G
darker: 1 (eq: False, dd: False), confidence: 2, worker: A3IPKVTS5K06LP
darker: 1 (eq: False, dd: False), confidence: 2, worker: A2YYHNACJ8MFTU
(0: guessing, 1: probably, 2: definitely)