The primary color is the dominant color that defines a card's visual identity - the main color that:
It follows inheritance: cards inherit from category, category from deck default.
Set once at category level → All cards in that category get the color automatically.
Three levels:
Resolution order:
Most decks only define colors at the category level.
The baseline for cards without category/card colors.
To set:
Used by cards whose category and card colors aren't set.
The most common approach - each category gets its own color.
To set:
All cards in the category inherit this automatically.
Typical usage:
For specific cards that need different colors.
To override:
Only that card changes - others in category stay the same.
When to use:
If you're overriding many cards, consider a new category instead.
Select from your palette:
The color you choose becomes what templates use when they reference "primary color."
Templates reference "primary color" in their design.
Example: Template says "background = primary color"
It uses:
This separation lets templates stay reusable while cards maintain identity.
See Assign Colors in a Template.
Start at category level
Set colors per category, not per card. Creates clear groups automatically.
Use consistent roles
Category color 1 for "Questions" everywhere - builds learnable patterns.
Limit colors
3-7 distinct colors. Too many is overwhelming.
Consider accessibility
Sufficient contrast for varied lighting and color vision deficiencies.
Test with multiple cards
Color relationships look different when spread vs. single view.