community of dyers

I think what you want is a dilute golden yellow. Butter is colored naturally with beta-carotene from the cow's food, or by adding annatto, a food dye obtained from achiote trees. Both of these are orange in color, if the color is strong enough. Butter is a pale yellow only because only a small amount of coloring is present in it.

I strongly, strongly encourage you to dye something that is similar in color to your cotton fabric first, as a test, maybe a t-shirt, or better yet a test swatch of your fabric. You'll need to decide what dye concentration to use. The only time you should dye something without pre-testing the color is when you don't mind exactly what color you end up with.

Before you try ordering your dye for test-dyeing, play with Olli Niemitalo's Dye Mixer Applet, at http://iki.fi/o/dye/dyemixer/. Compare the color you get by adjusting the color strength downward for a lemon yellow, as compared to a golden yellow. Orange MX-2R is definitely way too close to red to work, though.

By the way, which dye supplier are you talking about? You always have to specify that, in any post that refers to pre-mixed dye color names, since pre-mixed colors vary so much from one supplier to another. "Clear yellow" is not used for any of the single-hue unmixed Procion MX dyes anywhere, as far as I know, and "golden yellow" is the name Dharma uses for yellow MX-GRN, while ProChem uses "goden yellow" for an entirely different dye, yellow MX-3RA. Here's a link to my page of Which Procion MX colors are pure, and which mixtures?. It's fine to use a particular company's catalog names, as long as you tell us which company it is.

-Paula