Layer Colour Classifier

Applies a yellow → green graduated colour style to any numeric attribute on a vector layer. Choose between equal-interval discrete steps or percentile quartiles. The style applies in-place to the layer — instant visual ranking in the QGIS canvas.

$20 USD One-time purchase · Instant download

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What you get

classify_layer.py

Free updates via Gumroad

What it does

Yellow → green gradient

Applies a clear low-to-high colour ramp using the yellow-green palette — immediately legible for any ranking or continuous value field.

Discrete or percentile

"discrete" divides the full range into 0.1-width equal steps. "percentile" divides by data distribution into four quartiles regardless of value range.

In-place style update

The style is applied to the layer renderer directly — no new file is created. The change is visible immediately in the QGIS canvas.

Any numeric field

Change the column name at the bottom of the script to classify any numeric attribute — NDVI, height, area, score, or custom field.

How to use it

1
Load your vector layer and check (tick) it in the Layers panel.
2
Open Plugins → Python Console → Show Editor.
3
Paste the script. At the bottom, set column (the field name to classify) and method ("discrete" or "percentile").
4
Click Run. The layer style updates immediately.

Requirements

QGIS 3.28 or newer
First checked vector layer with a numeric attribute field

Also in the GIS Utilities Pack

Get all 4 GIS utility scripts for $25 — save $5 vs buying individually.

View bundle