To elongate the leg, make sure your light jeans are a similar colour throughout and the wash is consistent. Go with a style you're comfortable with that sits on the hips and falls comfortably through the leg.
Colours and prints that go well with the light wash are just important as the denim itself! Look for lighter weight fabrics like cotton and silks.
This red trench coat is fashionable and fun, while underneath a lightweight blouse brings some pattern to the look.
A brightly-coloured blazer adds a nice pop to this look for the workplace.
Add a little shimmer with a metallic knit, and have some fun with accessories.