In Virtual Class: Color Intensity Confusion

I thought I had an issue trying to understand color values. Now I’m reading about intensity.

Intensity is the purity of the color; how true it is to its natural hue. High-intensity is bright; low-intensity is dull.*

Someone please correct me when I state anything untrue. I am trying to get my bearings around intensity.

Adding in white, grey, or black to a high-intensity color lessens its intensity, becoming a low-intensity color. (I am coming to this conclusion from page 28, The Aspects of a Color. It does not state my so-called conclusion. I am just surmising.)

But, now I have questions. Already.

How does one know a color is high- or low-intensity right out of the tube? Why is Cobalt Blue high-intensity when Indigo is low-intensity?

Page 28, Exercise 15 also has me confused. It shows a light blue color leading down to a dark blue color, and then calling that row Pure.

… [reading] …

Ah, I see. So, when I add water to thin out a pure color, it remains pure. But if I were to add white, it becomes low-intensity.

Fact: Adding two pure colors results in a lower-intensity color.*

Red is pure and so is White (caplitalized to show purity). Mixing them creates pink, which is lower-intensity than Red or White. But a true low-intensity?

Anyone that can help, please do so. I will keep reading in the meantime.

Lisa

*Exploring Color Workshop by (c) 2016 Nita Leland, North Light Books, IBSN-13: 978-1-4403-4515-9

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