Grayscale testing is an effective way to ensure accessibility for individuals with all forms of color blindness, as it removes reliance on color differentiation entirely. By focusing on contrast and tonal variation, designs remain visually clear and inclusive for everyone, regardless of their ability to perceive color.

Not everyone, clients included, understand the role of color and contrast in visuals. Feel free to copy this code and put the button on your page to let them know you are thinking about it as well and show that everything still works fine in the grey.