As a bit of an obsessive when it comes to product packaging, I often speculate about which colours and colour combinations are most effective on everything from branding to packaging to in-store promotions. I recently discovered this insightful graphic from Kissmetrics that delves into the psychology of colour. Regional and cultural nuances would factor in significantly but it is an interesting infographic nonetheless.
So it looks like Home Depot got it right by choosing bright orange as their branding colour as it attracts impulse buyers based on that infographic. Nice post.