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Generate distinct, accessible colors for charts, graphs, and data visualizations. Uses color harmonies for maximum perceptual distinction.
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Baseado na classificação ocupacional SOC
Audit and update all rampa project documentation after code changes. Use when adding features, changing defaults, modifying APIs, or before a release.
Generate mathematically accurate color palettes using OKLCH color space. Use when creating design systems, color ramps, accessible palettes, CSS variables for themes, or when user asks about color generation.
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| name | data-viz-palette |
| description | Generate distinct, accessible colors for charts, graphs, and data visualizations. Uses color harmonies for maximum perceptual distinction. |
| license | SEE LICENSE IN LICENSE.md |
| metadata | {"author":"ismael.fyi","version":"1.0.0"} |
Generate color sets optimized for charts, graphs, and dashboards. Colors are mathematically spaced for maximum distinction and equal visual weight.
npx @basiclines/rampa
Perfect for pie charts, simple bar charts:
rampa -C "<brand-color>" --add=triadic --size=2 -L 50:50 -S 70:70 -O css
Outputs: base, triadic-1, triadic-2 (120° apart)
Good for quarterly data, four-category comparisons:
rampa -C "<brand-color>" --add=square --size=2 -L 50:50 -S 70:70 -O css
Outputs: base, square-1, square-2, square-3 (90° apart)
Alternative with complementary + split for more nuance:
rampa -C "<brand-color>" --add=compound --size=2 -L 50:50 -S 75:75 -O css
Combine triadic with complementary:
rampa -C "<brand-color>" --add=triadic -L 50:50 -S 70:70 --size=2 -O json
# Then run complementary of each triadic color
Or use two interlocking triads at different lightness:
# Primary triad
rampa -C "<brand-color>" --add=triadic --size=2 -L 45:45 -S 70:70 -O css
# Offset triad (shift hue by 60°)
rampa -C "<brand-color>" --add=triadic --size=2 -L 60:60 -S 70:70 -H 60:60 -O css
For brand color #3b82f6:
# 4-color chart palette
rampa -C "#3b82f6" --add=square --size=2 -L 50:50 -S 70:70 -O css
Output:
:root {
--base-0: #3b82f6; /* Blue */
--square-1-0: #a855f7; /* Purple */
--square-2-0: #f97316; /* Orange */
--square-3-0: #22c55e; /* Green */
}
| Background | Recommended Lightness |
|---|---|
| White (#fff) | 45-55% |
| Light gray (#f5f5f5) | 45-55% |
| Dark (#1a1a1a) | 55-65% |
| Black (#000) | 60-70% |
| Use Case | Saturation |
|---|---|
| Bold, attention-grabbing | 75-85% |
| Professional, muted | 55-65% |
| Accessible (colorblind-friendly) | 60-70% |
For colorblind-safe palettes:
Example with lightness variation:
rampa -C "#3b82f6" --add=square --size=1 -L 40:40 -S 70:70 -O css # darker
rampa -C "#3b82f6" --add=square --size=1 -L 60:60 -S 70:70 -O css # lighter
--size=2 gives minimal ramps (2 shades each) - good for data viz