Table 1 The color measurements for products from brands A, B, C, and D used in the experiments. For each brand, shade 1 indicates the lightest shade and shade 8 the darkest.

From: Discoloration of liquid foundation across the shade color diversity

Brand

Shade

L*

a*

b*

C*

h

A

1

79.33

5.92

23.07

23.81

75.61

A

2

76.03

9.51

19.82

21.98

64.36

A

3

70.38

11.11

25.81

28.10

66.71

A

4

68.86

13.57

26.73

29.98

63.08

A

5

65.97

12.57

27.80

30.51

65.67

A

6

62.20

12.66

25.95

28.87

63.99

A

7

43.43

14.72

20.98

25.63

54.95

A

8

35.21

10.45

12.75

16.48

50.65

B

1

81.37

8.51

17.43

19.40

63.99

B

2

79.77

9.30

23.21

25.00

68.15

B

3

70.54

10.65

22.71

25.08

64.88

B

4

69.19

11.55

27.97

30.27

67.56

B

5

56.71

15.62

27.47

31.60

60.37

B

6

54.28

16.11

27.70

32.04

59.82

B

7

46.09

17.54

25.63

31.06

55.61

B

8

36.87

12.43

14.99

19.47

50.32

C

1

86.51

6.81

17.10

18.41

68.28

C

2

86.45

5.01

22.49

23.04

77.45

C

3

72.64

11.24

28.67

30.80

68.59

C

4

66.13

13.75

30.48

33.44

65.73

C

5

55.59

17.38

27.01

32.12

57.24

C

6

50.01

16.01

27.93

32.19

60.17

C

7

37.64

17.96

19.25

26.33

46.99

C

8

34.06

10.66

12.68

16.56

49.94

D

1

78.48

9.00

22.76

24.48

68.42

D

2

69.28

10.04

18.05

20.65

60.92

D

3

68.93

9.27

21.37

23.30

66.54

D

4

63.53

14.03

27.14

30.55

62.67

D

5

54.32

15.16

28.83

32.58

62.27

D

6

47.36

17.59

22.70

28.72

52.23

D

7

41.19

13.10

18.28

22.48

54.38

D

8

36.14

11.44

12.84

17.19

48.29