AO3-6749 Fix top-level menu item text color in Low Vision Default #4482

Job	Run time
rake db:otwseed	1m 7s
rspec spec/controllers	11m 40s
rspec spec/models	5m 13s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	7m 12s
cucumber features/admins	5m 32s
cucumber features/bookmarks	4m 30s
cucumber features/collections	5m 52s
cucumber features/comments_and_kudos	6m 13s
cucumber features/gift_exchanges	6m 59s
cucumber features/importing	2m 43s
cucumber features/other_a	11m 12s
cucumber features/other_b	6m 7s
cucumber features/prompt_memes_a	3m 59s
cucumber features/prompt_memes_b	3m 37s
cucumber features/prompt_memes_c	4m 48s
cucumber features/search	6m 39s
cucumber features/tag_sets	2m 59s
cucumber features/tags_and_wrangling	5m 56s
cucumber features/users	4m 32s
cucumber features/works	14m 10s
	2h 1m 0s

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