I want my Android app to have its background color set as #F1F1F1.
The Material design guidelines suggest 'The status bar should be the darker 700 tint of your primary color.' What does it mean ?
Should I use #(F1*0.7)(F1*0.7)(F1*0.7) as my status bar color ?
Look at the color palettes on the material design spec page (http://www.google.com/design/spec/style/color.html#color-color-palette). Each tint in a palette has a number—that's what the 700 refers to.