Table 2 Post-hoc mean L* comparisons among study groups

Control/white

−4.47

0.002*

10.10

<0.001*

Control/blue

−1.98

0.999

7.33

<0.001*

Control/yellow

−3.48

0.035*

5.95

<0.001*

Control/green

−0.93

0.999

4.97

0.006*

Control/reddish-brown

−1.62

0.999

4.16

0.045*

White/blue

2.49

0.428

−2.77

0.697

White/yellow

0.98

0.999

−4.15

0.046*

White/green

3.54

0.030*

−5.13

0.004*

White/reddish-brown

2.84

0.188

−5.94

<0.001*

Blue/yellow

−1.51

0.999

−1.38

0.999

Blue/green

1.05

0.999

−2.36

0.999

Blue/reddish-brown

0.35

0.999

−3.16

0.350

Yellow/green

2.56

0.370

−0.98

0.999

Yellow/reddish-brown

1.86

0.999

−1.78

0.999

Green/reddish-brown

−0.69

0.999

−0.81

0.999