Top: (B − R) vs. orbital inclination plot of CKBOs and all KBOs with indication of Haumea family objects. The correlation for CKBOs alone is stronger than for all KBOs. The clustering of Haumea family objects had a strong effect on this correlation. Middle: Tisserand parameter relative to Neptune (T_N) vs. orbital inclination as for the above. T_N is very strongly correlated with i for CKBOs. Bottom: (B − R) vs. T_N as for the above. Given the very strong link between T_N and i, statistically one cannot know if only T_N or i have a (potentially) physically meaningful relation with (B − R) but none dominates the other.