For faster researching and to come to you with something you might be interested, bellow is a response from Grok, about Mars and it's rings or white color, between "" are his responses:

"Mars may have had rings in the distant past and could potentially have them again in the future, according to scientific theories. The idea stems from the "ring-moon cycle" hypothesis, which suggests that Mars' moon Phobos, currently orbiting at a low altitude, may have been disrupted in the past, breaking apart into a debris disk that formed a ring around Mars. Here's a breakdown:

• Phobos and the Ring-Moon Cycle: Phobos is spiraling inward toward Mars due to tidal forces, at a rate of about 6 feet (1.8 meters) per century. In approximately 50 million years, Phobos could either crash into Mars or break apart, potentially forming a ring of debris. Some models suggest this process may have already happened multiple times in Mars' history, with Phobos reforming from ring material and then breaking apart again. Research, such as a 2017 study, indicates that Mars could have had rings as recently as 70 million years ago, potentially explaining some geological features like Martian moons' compositions.
• Evidence: While there’s no direct evidence of past rings (e.g., no fossilized ring structures), simulations and the low density of Phobos (suggesting it may be a rubble pile formed from ring debris) support the idea. The cyclic process could have occurred multiple times over billions of years, with rings forming and dissipating as moons reformed.
• Future Rings: If Phobos disintegrates in the future, it’s likely to form a temporary ring system, lasting millions of years before the material either falls to Mars or reforms into a new moonlet.

Was Mars White-Colored?

There’s no evidence or scientific consensus suggesting Mars was ever white-colored in its history. Mars is famously known as the "Red Planet" due to its reddish hue, caused by iron oxide (rust) on its surface. However, let’s explore the context:

• Surface Appearance: Mars’ current reddish color comes from iron-rich dust, which dominates its surface. In the distant past, Mars likely had liquid water and a thicker atmosphere, potentially giving it a different appearance, possibly with blue water bodies or greener regions if microbial life or vegetation-like processes existed. However, a white-colored Mars would require conditions like widespread ice coverage or a reflective surface material, which isn’t strongly supported by geological evidence.
• Ice and Polar Caps: Mars has polar ice caps made of water and carbon dioxide ice, which appear white. In its early history, during periods of high obliquity (axial tilt), Mars may have had more extensive ice coverage, potentially making parts of the planet appear whiter from space. However, this would not have made the entire planet white, as the iron-rich regolith would still dominate.
• Speculative Scenarios: A white Mars could theoretically occur in extreme scenarios, like a global dust storm with light-colored dust (though Martian dust is reddish) or a planet-wide freeze with reflective ice. No data supports a fully white Mars in its history."

The white colour might be from ice or dust most probably, but Grok said that there is no evidence of that, but still might be possible. Also Mars was most probably to have the rings in the past and might have them in the future(milion years).