color contrast tests for system color FieldText with opacity:0.54

All text/background combinations have a default contrast ratio that passes the minimum threshold of 4.5:1
1.4.3 Contrast (Minimum): The visual presentation of text and images of text has a contrast ratio of at least 4.5:1, except for the following: (Level AA)

Color values are derived from testing each of the provided schemes in Windows Vista, the resulting color values are indicated in the text boxes.

Tested by adding:opacity: 0.54 to the style declaration for input in the Firefox res/forms.css.

Note: colors have been set on the field text rather than the placeholder text for demonstration purposes.

vista basic

windows standard

windows classic

windows High Contrast White

windows High Contrast Black

windows High Contrast #2

windows High Contrast #1