GameDatabase: Disable true colour for Mega Man 8

data/resources/database/gamesettings.ini

@@ -1416,3 +1416,21 @@ ForceSoftwareRendererForReadbacks = true
 # Stutter in text boxes due to 200+ readbacks per frame.
 [SLUS-01363]
 ForceSoftwareRendererForReadbacks = true
+
+
+# SLES-01064 (Mega Man 8 (Europe))
+# Text boxes mismatch in RGBA8 format.
+[SLES-01064]
+DisableTrueColor = true
+
+
+# SLUS-00453 (Mega Man 8 (USA))
+# Text boxes mismatch in RGBA8 format.
+[SLUS-00453]
+DisableTrueColor = true
+
+
+# SLPS-00630 (Rockman 8 - Metal Heroes (Japan))
+# Text boxes mismatch in RGBA8 format.
+[SLPS-00630]
+DisableTrueColor = true