What is a colour space?

Since I am deconstructing the rainbow/spectrum in RGB, HSV color spaces, I will show it in dichromat “color space”, and finally will then make a new one in CIE L*a*b* color space I thought I should include a review of the basics. So what is a color space? This good post answers that question.

Colour chat

In my job I probably use the phrase “colour space” every day and have done for the last 20 years. So imagine my surprise when I was talking with a colleague recently and after a few minutes he said “Can I stop you for a second there Steve – when you say colour space, what exactly do you mean?”.

A colour space is like a map. A map of New York, for example, shows the location of various landmarks with reference to the xy coordinates (the position in horizontal x and vertical y units on the map). A colour space or colour map does the same thing with colours. Perhaps the simplest colour space is the spectrum, see below:
 myspectrum

As we look from right to left on the spectrum the wavelengths changes from around 700nm on the far left to about 400nm on the far right. So this map shows…

View original post 709 more words

7 responses to “What is a colour space?

  1. Pingback: The rainbow is dead…long live the rainbow! – Part 1 «·

  2. Pingback: The rainbow is dead…long live the rainbow! – Part 2: a rainbow puzzle «·

  3. Pingback: The rainbow is dead…long live the rainbow! – Part 3 « MyCarta·

  4. Pingback: The rainbow is dead…long live the rainbow! – Part 4 – CIE Lab heated body « MyCarta·

  5. Pingback: The rainbow is dead…long live the rainbow! – Part 5 – CIE Lab linear L* rainbow « MyCarta·

  6. Pingback: Comparing color palettes | MyCarta·

  7. Pingback: The rainbow is dead…long live the rainbow! – Part 3 | MyCarta·

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s