Meaning
A solid orange circle, added with the coloured shapes in emoji version 12.0. It stands for the colour orange and works as a status dot between yellow and red.
People use it for medium alerts, traffic-light ratings, colour-coded lists and team colours: “Project status: 🟠 a bit behind, not a disaster” It also stands in for oranges, sunsets or autumn tones in colour moodboards. Compare 🔶 for a diamond in the same colour.