Amidst challenges like a booming global population and diminishing arable land, plant phenotyping offers a way to automate agriculture and improve crop diagnostics. However, translating the precision of controlled-environment phenotyping to field conditions remains a hurdle, particularly in accurately measuring leaf color due to sunlight glare. Existing solutions, ranging from light scattering simulations to 3D sensor fusion, often require complex, time-consuming, or impractical methods.