You can look totaly stylish without really trying by opting for a white v-neck t-shirt and blue jeans. If not sure as to the footwear, introduce a pair of white low top sneakers to the equation.
White Low Top Sneakers with Blue Jeans Outfits For Women After 40
This combo of a black shawl cardigan and blue jeans is on the casual side yet it's also cool and stylish. For something more on the casual and cool end to complement your outfit, add white low top sneakers to the mix.