Sesame seeds come in different colors, primarily white and black, due to genetic¹ variations and processing differences:

Genetic Factors:

Black sesame seeds retain their dark outer hull² (seed coat), which contains pigments³ like anthocyanins and other antioxidants.

White sesame seeds are typically hulled⁴ (outer layer removed), revealing the lighter⁵ inner kernel⁶.

Natural Varieties:

Some sesame plants naturally produce seeds with darker hulls⁷ (black) due to specific genetic traits, while others have lighter or tan hulls that appear white after processing.

Nutritional⁸ & Culinary Differences:

Black sesame seeds are often considered nutritionally richer in certain minerals and antioxidants.

White sesame seeds are more common in baking and garnishing⁹ due to their milder flavor and appearance.

In summary, color differences stem from genetics, the presence or removal of the hull, and the natural pigments in the seed coat.

芝麻种子有不同的颜色，主要是白色和黑色，这是由于遗传变异和加工差异造成的：

遗传因素：

黑芝麻保留了其深色的外壳（种皮），其中含有花青素和其他抗氧化剂等色素。

白芝麻通常去皮（去除外层），露出较轻的内核。

天然品种：

由于特定的遗传特征，一些芝麻植物自然会产生外壳较深（黑色）的种子，而另一些芝麻植物则具有较浅或棕褐色的外壳，在加工后呈白色。

营养和烹饪差异：

黑芝麻通常被认为富含某些矿物质和抗氧化剂。

白芝麻在烘焙和装饰中更为常见，因为它们的味道和外观更温和。

总之，颜色差异源于遗传、外壳的存在或去除以及种皮中的天然色素。