Update _common.scss to ensure the label for buttonPrimary is readable #1068
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Current green background color is too light to be used for the white label text - it provides just 2.5:1 in color contrast while 3:1 is the bare minimum for large text and 4.5:1 or more is recommended. Changing the mixin to use a slightly darker gray keeps the bright visual appearance of the button while also providing the white label text with sufficient color contrast (4.47:1) for better readability and accessibility.
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Current green background color is too light to be used for the white label text - it provides just 2.5:1 in color contrast while 3:1 is the bare minimum for large text and 4.5:1 or more is recommended. Changing the mixin to use a slightly darker gray keeps the bright visual appearance of the button while also providing the white label text with sufficient color contrast (4.47:1) for better readability and accessibility.