Current issue is that colors used for marking tutor proficiency with class (yellow, green, blue) are exceptionally similar in hue and brightness. For individuals with red-green colorblindness or other visual deficiencies, these colors are difficult to distinguish.
A better alternative is to additionally use border thickness / pattern (solid / dotted) to represent degree of familiarity with class.
Using bold / italics / underline does not quite establish the same hierarchy so is probably not the best option.
Current issue is that colors used for marking tutor proficiency with class (yellow, green, blue) are exceptionally similar in hue and brightness. For individuals with red-green colorblindness or other visual deficiencies, these colors are difficult to distinguish.
A better alternative is to additionally use border thickness / pattern (solid / dotted) to represent degree of familiarity with class.
Using bold / italics / underline does not quite establish the same hierarchy so is probably not the best option.