Why over-budget should never just be “red”

Roughly 8% of men and 0.5% of women have some form of color vision deficiency. If your budget signals "you overspent" with red alone, you have quietly built a product that fails one in twelve of your users at the exact moment the information matters most.

Color is an enhancement, never the message

The rule we hold in finura is simple: a status color never carries meaning by itself. It always travels with a shape, an icon, or a word.

• On track shows a label — "on track" — not just a teal bar.
• Over budget shows the amount — "$30 over" — next to the danger color, not instead of it.
• The progress bar changes color and is annotated, so it reads in grayscale and on a bad projector.

The test we actually run

Before a status treatment ships, it has to pass two checks:

1. Grayscale. Desaturate the screen. Can you still tell over from on-track? If not, the design is failing on color.
2. Adjacency. Put the category colors next to each other. Can a red-green colorblind user still separate them? Our categorical palette is chosen for exactly this.

If the meaning disappears when the color does, the color was doing a job it should never have had.

It is not just accessibility

Labeling overages makes the interface faster for everyone. "$30 over" tells you the size of the problem; a red bar only tells you there is one. Accessibility and clarity turn out to be the same design, which is usually how it goes.