Table 6 Post-hoc mean b* comparisons among study groups

Control/white

−0.80

0.013*

−0.08

0.999

Control/blue

−0.59

0.192

0.51

0.394

Control/yellow

−2.42

<0.001*

−1.46

<0.001*

Control/green

−0.61

0.154

−0.11

0.999

Control/reddish-brown

−8.18

<0.001*

−9.57

<0.001*

White/blue

0.21

0.999

0.60

0.152

White/yellow

−1.62

<0.001*

−1.38

<0.001*

White/green

0.19

0.999

−0.03

0.999

White/reddish-brown

−7.38

<0.001*

−9.48

<0.001*

Blue/yellow

−1.83

<0.001*

−1.97

<0.001*

Blue/green

−0.02

0.999

−0.63

0.101

Blue/reddish-brown

−7.59

<0.001*

−10.08

<0.001*

Yellow/green

1.81

<0.001*

1.34

<0.001*

Yellow/reddish-brown

−5.76

<0.001*

−8.11

<0.001*

Green/reddish-brown

−7.57

<0.001*

−9.45

<0.001*