One of my black chickpea plants from MIgardener produced speckled seeds
(https://i.ibb.co/NVmy9g5/IMG-8402.jpg) (https://ibb.co/kH9S4Vj)
The different colors and sizes are because some aren't fully dried yet
Also I found a cool paper about chickpea testa patterns. https://onlinelibrary.wiley.com/doi/full/10.1002/leg3.29