Is there any specific reason on using *color or is it a typo?

[techie-joe]

On Layout Example style.css line 141

https://github.com/pure-css/pure/blob/main/site/static/layouts/pricing/styles.css#L141

Is there any specific reason on using *color or is it a typo?
Cause my lint shout it as an error.

.pricing-table-price span {
...
*color:#fff;
}