Is there a connection between color temperature concept and Hershel's color temperature experiment through which he discovered infrared?

Question

I just watched a Cosmos episode about Hershel's experiment, of which i think i was not aware. According to it, red light temperature is higher than blue (measured in celsius). As far as I know, however, color temperature is measured in kelvins, and blue has higher temperature than red. Are these two separate concepts?

Answer 1

As objects are heated they reach a temperature where they begin to glow. First dull-red-hot, then cherry-red, then white-hot. Seems the temperature and color outputted are the same regardless of material. For centuries, iron workers, glass blowers and ceramic potters, have used the glowing color as a marker. The Celsius temperature scale is favored by scientists because it blends in with the metric system.

There seems to be no limit as to how high a temperature is possible, however the lower limit is -273.16°C. It is presumed that if a material is cooled to this absolute lowest possible temperature, molecular motion ceases. The Absolute temperature scales sets -273.16°C as the zero point. Thus all readings will be positive, no confusing negative temperatures with positive. The Absolute scale was renamed the Kelvin scale to honor William Thomas, 1st Baron Kelvin.

K = C + 273.16

C = K – 273.16

All objects above
-268°C --- 5°K Infrared radiation (electromagnetic radiation) invisible to human.

400°C --- 673°K Red heat, visible in the dark

474°C --- 747°K -- Red heat, visible in the twilight

525°C --- 798°K -- Red heat, visible in the daylight

581°C --- 854°K - Red heat, visible in the sunlight

700°C ---973°K - Dark red

800°C --- 1073°K - Dull cherry-red

900°C --- 1173°K - Cherry-red

1000°C -- 1273°K - Bright cherry-red

1100°C --- 1373°K - Orange-red

2525°C --- 2800°K - Yellow

3225°C --- 3500°K - Yellow-White

4225°C --- 4500°K - Warm-White

5225°C --- 5500°K - White

6125°C --- 6400°K - Sky Blue