Determine Colour Value (Level of Darkness not 16777215 for white!)

Hi,

I am trying to determine the value of a colour (any colour), so that I can tell how dark/light this colour is. Unfortunately the long value in vb ie. 16777215 for White does not tell you accurately enough if a colour is dark or light.

I want to be able to change the colour of text to white if the back colour has been selected to dark.

I have searched the web for a couple of hours now and cannot find anything. Your help would be very welcome.

Thanks

TC

Not sure how you would determine a dark color from light but this might help.

You can separate the RGB components from a color value using this code

Code:

---

    Dim lngColor As Long
    Dim Red As Long
    Dim Green As Long
    Dim Blue As Long
   
    lngColor = 16777215
    Red = lngColor And &HFF&
    Green = (lngColor \ &H100&) And &HFF&
    Blue = (lngColor \ &H10000) And &HFF&

---

You can convert the RGB values to Hue, Saturation or Luminance. Search Google for the code.

Hi brucevde,

Thanks for your posting but I've looked at Hue, Saturation and Luminance. None of them determine how dark/light the colour is. That is something called the 'colour value' but it doesn't relate to the value in vb.

Thanks anyway

TC