Her approach is conceptual and spans multiple media. She often uses a limited colour palette, focusing on greys alongside sepia tones. Lemieux avoids a single signature style, choosing instead to let the idea dictate the form. In Available Portrait Colours, she examines the mechanics of representation through a grid of paint samples. Her work often references historical photography and found objects to explore collective memory.

Collectors value the intellectual clarity of her compositions. Her use of grids and repetition provides a sense of order that fits well in modern interiors. Pieces such as Apparition and Untitled offer a quiet, contemplative quality. The work does not rely on bright colours to command attention. Instead, it uses scale and texture to create a calm presence in a room.