Hi Wendy… How wonderful that you’re able to make your own butter! As for the color of the butter….Whether or not it is a “deep yellow” would depend on the variety of the cow and what time of year you’re getting the milk from the cow to make your butter. Cows that graze on grass from May through September will be absorbing more betacarotene (from the live grass), which contributes to a butter’s deeper yellow color. During the winter, farmers often feed their cows a diet that is primarily grass-hay (with less beta-carotene), and also supplement with some grain (eg, corn) because cows tend to lose weight when they eat only hay. Even if they go out to graze on pasture in the winter, the grass will not be lush and green as it is during the summer. You may be eating “winter butter”!