Sun spots are just cooler regions of the Sun's surface, so they appear darker. A simplistic answer is that they are just a darker hue of the normal colour of the Sun.
A more detailed answer is that they are all different, depending on the visual perceptual property and who the observer is - as all observers will see a different value depending on their spectral sensitivity.
See the related link of a sun spot, and draw your own conclusions.
I have sun spots, can others get them if they wear my clothes?
Huge streams of hot, magnetically charged gases. The sun spots are cooler parts of the surface.
These are called sun spots.
The Sun has got its spots on The Sun has got its spots on
Photosphere
Sun spots.
sun spots are cooler parts of the sun
the sun spots like black little spots on the sun that explode every 11 years
Saturn may or may not have Saturn spots. Only the sun has sun spots.
Sun spots.
sun spots
Sun spots are not permanent, therefore it depends.
sun spots are cold
his spots are a blueish green color
I have sun spots, can others get them if they wear my clothes?
We call them sunspots, but dark and cool are relative terms. A sunspot is dark only relative to the surrounding solar surface, but still intensely bright compared to your common household light bulb. It's cooler than the surrounding solar material, but still hot enough to vaporize a spaceship and anyone inside it in a fraction of a second.
Sun spots are colder than adjacent parts of the sun.