How to Use Color to Guide Attention
In a well-designed slide, color does work. It tells your audience: look here first. Used without intention, color creates noise. Used well, it creates hierarchy.
The 60-30-10 Rule
A simple starting point for any slide palette:
- 60% — Neutral background (white, off-white, light gray)
- 30% — Secondary color for supporting elements, borders, and text
- 10% — Accent color for the single most important element
Your accent color is a spotlight. Use it once per slide, on the thing you most want people to notice.
Building a Slide Palette
Start with two colors maximum:
- A neutral (background + secondary text)
- An accent (highlight, CTA, key data point)
Add a third color only if you have a clear structural reason — for instance, two competing products each need a distinct color.
Avoid:
- More than 3–4 colors in a single deck
- Multiple vivid colors competing at the same saturation
- Color as decoration with no semantic meaning
Semantic Color Use
Once you've chosen your palette, use colors consistently:
| Color | Meaning |
|---|---|
| Accent (e.g. orange) | Primary data point, key insight |
| Gray | Supporting data, context |
| Red | Warning, risk, negative trend |
| Green | Positive trend, confirmed, go |
If orange means "important" on slide 4, it must mean "important" on slide 14. Inconsistency breaks trust.
Color and Data Charts
In bar charts and line graphs:
- Highlight the one bar or line that carries your message in your accent color
- Gray out all other data series
- Never use red/green together — colorblind accessibility
Before: 5 bars in 5 different colors
After: 4 gray bars + 1 accent bar (the one you're talking about)
Contrast and Readability
The minimum contrast ratio for accessible text is 4.5:1 (WCAG AA).
Quick test: squint at your slide. If the text blurs into the background, the contrast is insufficient.
Common failures:
- Light yellow text on white backgrounds
- Dark navy text on black backgrounds
- Gray text below 14px with under 3:1 contrast
Dark vs. Light Themes
Light themes (white/off-white background) work best for:
- Document-style presentations shared as PDFs
- Small rooms with high ambient light
- Decks that will be printed
Dark themes work best for:
- Large screens, auditoriums, conference rooms
- Tech and creative industry audiences
- Video backgrounds and cinematic aesthetics
Don't mix. Pick one and stay consistent throughout the deck.