yellow
Candle burns with a yellow flame because its an incomplete combustion. The temperature of the flame also relates to its colour and also the trace metal ions present will influence the flame colour.
The flame of a candle is a source of light.
Typically, thinner candles tend to burn faster regardless of color. This is because the thickness of the candle determines the rate at which wax is consumed by the flame.
The color in the candle flame shows the fuel used. It also shows temperature. The colder part of the flame is red and the closer the color is to white is the hottest. The blue color comes from the soot of the wick.
The color of a candle flame can indicate the temperature at which it is burning. A blue flame typically indicates a hotter, more complete combustion, while a yellow or orange flame suggests incomplete combustion and may be due to impurities in the fuel source.
See if this linked page helps.
In Kabbalistic teachings, the candle flame color that corresponds to the "ruach" level of the soul is typically associated with a green or blue flame. Ruach represents the emotional and spirited aspects of the soul, and these colors symbolize healing, balance, and harmony. The flame's movement and brightness can also reflect the vitality of one's emotional state.
A candle flame is seen because it consists of glowing gases.
When salt is sprinkled on a candle flame, the salt absorbs the heat, causing the flame to change color slightly and emit a bright yellow light. The salt also reacts with some of the wax vapors, creating additional colors in the flame, such as orange and blue.
Purple is the color the flame gets when it is very, very hot. I don't know how a candle can get that hot, though. It's got no spiritual meaning! It's just hot!
The color of the flame relates to the temperature of the candle or gas stove because different colors indicate different temperatures. A blue flame is typically hotter, around 1,400-1,800 degrees Celsius, while a yellow or orange flame is cooler, around 1,100 degrees Celsius. The color change is due to the amount of oxygen reaching the fuel and the completeness of the combustion process.
The candle flame flickered in the dark room, casting shadows on the walls.