Name it
Point the camera or use a photo. You get the color family, how light it is, what it is easy to mix up with, and how sure the read is.
Same or not?
Tap one spot, then another. You get yes, close, or no, and a warning when the two only differ in a way your cones may miss.
Save to wardrobe
Scan a shirt, shoe, or fabric and save it on this device. Pick two to see if they match.
Saved wardrobe
No swatches yet. Open the camera or a photo, then tap Save.
Does A match B?
Saved on this device only. Clearing your browser's site data deletes them.
Wire color
Show someone what I see
Full color on top. Your cones underneath. Hand them the phone.
Nothing is uploaded. 100% is typical response for that cone. 0% is the full deficiency, such as protanopia for red.
Why the camera? It is only used to read the color you point at. Your browser asks before it starts, and the picture stays on this device. No camera, or you would rather not? Use a photo instead.