Coloured precision markers follow the same calibrated tip logic as their black counterparts, but their use shifts accordingly. Sepia and brown produce a warm, aged line close to traditional India ink, making them common in architectural sketching, botanical illustration, and portrait drawing where pure black can read as too stark. Red and blue are the standard annotation colours: they stand out clearly on an existing drawing without blending into the primary linework, making them effective tools for correction, highlighting, or visual coding in technical documents. Calibrated greys allow a light value layer to be added without the saturation of a colour, useful for cast shadows in quick sketching or creative layout work. Pastel tones lean toward lettering, bullet journaling, and page layout where their lightness creates a soft contrast against darker text or illustration. In all cases, the pigment-based ink is water-resistant once dry, allowing these markers to be combined with wet media without bleeding. Also explore our selection of precision markers and pens and our full markers and pens collection.