Color is usually some shade of yellow and often varies with the concentration of the sample. The most common color descriptions of normal urine are straw, light yellow, yellow and dark yellow. Amber colored urine is seen in patients with increased bilirubin levels and may indicate hepatitis.
Add the knowledge of bowling's perfect score, 300, and it stands to reason 10 strikes in a row is a perfect 300.
It depends on the standard of the league, lower standard tends to flatter the bowlers as batting falls off more dramatically than bowling. If for example you are playing first grade in Sydney grade cricket (a very high standard) a bowling average in the mid 20s would be considered good, low 20s very good, and below 20 exceptional.