Note
Colors Are How You Encode Meaning
Most advice about colors on slides and dashboards stops at aesthetics. But if done right, they signal meaning before a single word is read.
Most advice about color lies at the aesthetic level.
“Use no more than three colors.”
“Make sure it’s legible.”
“Pick a clean palette.”
None of these are wrong…
But they operate at the surface layer—technique.
If you stop there, color becomes decoration.
The real fundamental question is: What does color represent?
Color Is Encoded Meaning
As humans, we are already conditioned to interpret color as a signal.
When you see a red traffic light, you don’t analyze it. You stop.
Yellow means caution.
Green means proceed.
The meaning is pre-attentive. It happens before conscious reasoning.
This is why color is so powerful in slides and dashboards.
It’s not purely a stylistic choice.
It’s signaling.
RAG: A Cognitive Shortcut
In project management, RAG (Red–Amber–Green) is widely understood.
- Red → Risk. Off-track. Requires intervention.
- Amber → At risk. Monitor closely.
- Green → On track. No immediate concern.
When you label a status as red, you are not simply coloring an element.
You are activating an expectation.
That expectation should be deliberate.
If something is materially problematic, color it red.
Conversely, if everything is green, it communicates stability before the audience reads a single word.
Beyond RAG: Primary and Accent Colors
Many teams stop at red, amber, and green.
But color also controls attention.
Every deck and dashboard should have:
- A primary color
- An accent color
The primary color establishes visual consistency.
For example, my primary color is #2F2934—a deep, muted charcoal that anchors the overall tone.
The accent color serves a different purpose.
It’s not for decoration.
It’s for emphasis.
Use an accent color sparingly to:
- Highlight key callouts.
- Draw attention to a critical data point.
- Outline a recommendation box.
- Signal the core takeaway of a slide.
If everything is accented, nothing is.
Hierarchy Through Shades
It’s worth noting: You are not limited to one tone of your primary color.
Different shades create hierarchy without introducing visual noise:
- Darker shades → More weight, more importance.
- Lighter shades → Supporting information.
- Very light tints → Background structure.
Rather than adding more colors, deepen the system you already have.
This allows you to structure information without shouting.
The Most Underrated Tool: Gray
Gray is often dismissed as “boring.”
In reality, gray is one of the most powerful structuring tools.
When something is secondary, closed, or not the focus, gray it out.
Don’t let every element compete at full intensity.
In dashboards especially, this matters.
If every label, axis, gridline, and annotation is dark, the eye has nowhere to rest.
When you intentionally reduce the visual weight of non-critical elements:
- The audience knows where to look.
- You control attention without aggressive highlighting.
So… What’s The Colorway?
Color is how you encode meaning.
Think about it in three layers:
- Status signalling—red, amber, green instantly communicate condition.
- Attention signalling—accent colors direct focus.
- Hierarchy signalling—primary shades and gray indicate importance.
Before choosing colors, ask yourself:
- What needs instant interpretation?
- What deserves focus?
- What should fade into the background?
If you cannot answer those questions, the issue is not your palette.
It is your thinking.
When color is deliberate, your slide communicates before it is read.