What color corresponds to the range of 30-39?

The color that corresponds to the range of 30-39 is orange. In various categorization systems, especially those involving charts or scales like the ones used for temperature, warning levels, or even age demographics, different colors are often used to signify specific ranges. In many cases, the color orange is used to indicate a moderate level of intensity or importance, which is fitting for the range of 30-39.

Other colors in the provided choices typically represent different ranges. For instance, brown might signify a lower range, red often indicates a higher severity or critical level, and yellow may denote a lower intensity or precautionary range. Therefore, orange serves as an ideal representation for the mid-range categorization, making it the correct answer in this context.