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Using strncasecmp(3) with the lenght of the user-supplied colour name will result in a false positive when the db key starts out with the same string. Eg, blue will also match BlueViolet (aka blue violet). Since the shorter strings occur first in the database, avoid such errors by treating a 0 result from strncasecmp(3) as a positive result when the key’s length is longer than the supplied string’s.