Product18 May 20264 min read
How EmailArt pulls your brand colours out of a logo
By EmailArt team
Upload a logo, get a palette. It looks like magic; it's mostly just clustering and a bit of taste baked into the defaults.
The pipeline
- Decode the uploaded image in the browser (no server round-trip)
- Sample pixels, weighted away from near-white and near-black backgrounds
- Cluster the samples into a small palette using k-means
- Rank clusters by saturation and coverage, keeping the top few
- Assign the most vivid to "primary", the next to "accent", the rest as neutrals
Why we don't ask you to type hex codes
Because the person setting up a signature usually doesn't know the brand palette off the top of their head. The logo is the one brand asset everyone has to hand — start there.