Radiochromic materials, including films, gels, and polymers, are widely used in radiation dosimetry due to their ability to undergo a measurable color change upon exposure to ionizing radiation. Radiochromic films offer two-dimensional high spatial resolution and are commonly used in clinical settings for dose verification and quality assurance in radiotherapy as well as diagnostic imaging. Gels, on the other hand, enable three-dimensional dose distribution mapping, making them ideal for complex treatment planning and validation. Radiochromic polymers represent an emerging class with tunable chemical properties and enhanced sensitivity, offering potential for advanced, flexible dosimetric applications. Together, these materials provide useful and accurate dosimetric information for radiation measurement across a range of medical and research applications.