Table 4. The correlation coefficients between color values and bitterness unit of ale beers with addition of MBA grape after fermentation

	Color values			Bitterness unit (IBU)
	Hue	Intensity	EBC unit
Hue	-	−0.67439***	−0.54192**	0.87721****
Intensity		-	0.97049****	−0.64125**
EBC			-	−0.48349**
Bitterness				-