i tend towards blues, creams, and browns in pottery. i don't think i do this with a specific purpose; more an inclination towards those hues. red is my least favorite color, followed by orange, but i do like pink rather a lot. primary and secondary hues aren't really my cup of tea (outside of yellow), they are just too strong and bright when used other than as an accent hue. tertiary hues and pastels though, those are lovely. give me a yellow-green, blue-purple, blue-green, or red-purple any day and i'm a happy kid. whites and creams allow me to admire the green shades of my tea, one of the nicest parts of drinking it. an explanation for the celedon color would be it's traditional, so you come across it a lot.
my collection of tea preparing pieces (clockwise from top left): bamboo chasen with celedon stand, tokoname kyusu, stoneware chawan for matcha, water cooler (my grandmother's), tea cup for sencha, hand thrown tea cup for bancha, tea chest in the upper right corner, chakin in lower right corner, teaspoon in lower left corner. it's a mishmash of pieces, i know, but i like each one and they make me happy (the only one i have to impress is myself, any how).