The thin red line going across the chest area is a great contrast against the white and next to the thick black stripe. (laselmastyle.com)
They come into my office and show me their lab, which is covered in red lines showing reactions to just about everything.... (cleanandleanrevolution.com)
We would not do what this government is doing, start from rigid red lines on immigration and then work out what that means for the economy afterwards. (totalpolitics.com)