A large number of men and a smaller number of women see color differently than you do, and that changes how a grade reads. Accessibility means never leaning on hue alone to carry meaning.
If the only thing telling viewers green means safe and red means danger is the color, part of the audience gets nothing.
This is a design problem, not a moral lecture. Solving it gives you a clearer edit, and clear edits hold attention for everyone. The audience you keep is larger, because clarity helps even viewers with perfect color vision.
Pair every color cue with a second signal. A shape, a label, a position, or motion can carry the same message so color becomes a bonus.
When you mark a team in red and blue, also tag them with a symbol or a text label. Viewers who cannot separate the two hues still follow the game.
The habit is cheap to build. Every time you reach for color to explain something, ask what else on screen could say the same thing. Once you start asking, you notice how often a shape or a label would have done the job better than a hue.
Text over video fails far more often from weak contrast than from an odd color. Light text on a light background disappears no matter how pretty the palette is.
Check the luminance difference between your text and the frame behind it. If they sit close in brightness, the words will vanish on a small screen.
A safe rule is to keep a clear gap in brightness between text and background, then use color only to reinforce what contrast already did. Grey text on a mid grey bar is the classic failure, because it looks tasteful in the edit and disappears on a phone in daylight.
Run through this list before every export. It takes minutes, and it catches the problems that are invisible to you and obvious to someone else.
The point is not to slow down your process, but to build a reflex that catches issues before a viewer does. After a while it stops feeling like a checklist.
Most of these fixes take seconds once you know to look for them, which is why the pass is worth keeping in your routine.
Designing for color blindness rarely hurts the grade. It usually forces cleaner decisions that help everyone.
Cues that rely on contrast and shape survive small screens, bad lighting, and tired eyes. A phone in bright sun washes out color, but it does not wash out a clear edge.
So the same decisions that welcome viewers with a color vision difference also rescue everyone watching in less than ideal conditions. That is a rare case where the right call is also the practical one.
It costs you almost nothing to build the habit, and the edit gets stronger in the process.
Four habits cover most of what accessibility asks of a grade, and none of them slow you down once they are automatic.
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