The results of the two studies showed that these elements of text fields were of most value:

• Enclosed text fields with a rectangular (box) shape performed better than those with a line affordance
• The text field box should be represented with a semi-transparent fill and a bottom line or with a fully transparent fill and an opaque stroke.
• Color contrast of the text field’s lines or strokes met the minimum 3:1 contrast ratios with the background
• Label text should be placed within the bounds of the text field box
• Text fields should have rounded corners