Red point: darker
Green point: lighter
Blue point: equal
Darker point: 2
Darker reflectance: 2
Darker method: C
Equal score: -0.0321422253049
Darker point darker score: 0.918480634778
darker: 2 (eq: False, dd: True), confidence: 2, worker: A1IOJ2LGMGISYM
darker: 2 (eq: False, dd: True), confidence: 2, worker: A1NX9Q0EAOPYN3
darker: 2 (eq: False, dd: True), confidence: 2, worker: AKG5TLUQ2WWED
darker: 2 (eq: False, dd: True), confidence: 2, worker: AR50UBGSH10FJ (marked invalid)
darker: 2 (eq: False, dd: True), confidence: 2, worker: A32M5FDKCPHMA
darker: E (eq: True, dd: None), confidence: 1, worker: A2Q27LZW3VNDIP
(0: guessing, 1: probably, 2: definitely)