Use an online color vision screening test
Take an Ishihara color plate test
Visit an optometrist or ophthalmologist for a professional exam
Ask for a color arrangement test such as the Farnsworth D-15
Ask for a more detailed test such as the anomaloscope
Test each eye separately
Use standardized lighting during testing
Repeat the test if results seem inconsistent
Review results with an eye care professional
Get a full eye exam if color vision changes suddenly