In the "Handmaid's Tale", the symbolism of the Handmaid's red costumes is clearly portrayed. Atwood uses these red costumes to show how plain the women are, and that they are full of "sin". According to a webpage of symbolism (
http://www.three-musketeers.net/mike/colors.html), the color red symbolizes energy, speed, strength, and love. Because red symbolizes energy, it shows how the Handmaid's endure all of the sexual abuse they receive from the men. The color red also symbolizes strength, which expresses that the Handmaid's had the strength to live life even though they were separated from their husbands and children. And at last, the color red also represents love, which shows that even though the Handmaid's were used as "sex machines", they still tried to fell the extra sense of love because in the Gildean Period, the Handmaid's were lacking love. In easier words, the only reason why people cared about Handmaids was because they could be used as sex machines for pleasure, and also to give birth to children. In conclusion, Atwood uses color symbolism to portray how the Handmaids had to live and adapt through the Gildean Period.