The Color Doppler Pathology test helps access blood flow after a stroke or other relevant conditions that might have impaired your blood flow. It furthermore assists in discovering the presence and amount of arterial plaques and other persistent issues such as disturbed blood flow. It further helps monitor blood flow to key organs like the heart, kidney, liver, etc. This very technique enhances the information obtained using color to highlight the direction of blood flow. Generally, to determine this, red and blue colors are used.