Finding value for colour when transparent

[Lawtz01]

Hi

If I have a colour of R148 G27 B29 and I want that colour but as 20% transparent, what value would I need?  Is there a similar calculation?

Thanks!

[melissapiccone]

You can't really do that in PS like in AI in ID, but you can lower the opacity of your brush or layers.

[Lawtz01]

Thanks! I'm actually working in Indesign, but I felt Photoshop may be more appropriate for colour issues.

To be clear, I know how to set transparency to a colour.  Maybe an image would help.  So, in the image shown, the red of the DRS logo is the brand colour.  For the background of the website, I would like an image coming through it, so need to set the transparency (to 80%).  However of course as you can see it changes the colour.

My question is, how do I find the value so I have the transparency but the colour is as per the brand colour of the logo?

Thanks!

[Norman Sanders]

If, with the Foreground color set to R149 G27 B29, you brought up the Color Picker you would see its Lab equivalent values. A change in the L (Lightness) value (it is currently 33 in a range of 0 to 100), will reduce or increase lightness only, discrete from color.  Its RGB equivalent will be displayed as you alter the L value.

[melissapiccone]

take the screenshot into PS and use the eyedropper? That's what I would do...

[Lawtz01]

I dont think I am explaining myself very well (or perhaps misunderstanding your answer?)

The lighter red background in the image is the same red as the DRS logo, but it is set to 80% transparent.

Another screen shot below.  So, the DRS logo I am actually going to use is white. But I need the transparent background to be the red of DRS (while maintaining its transparency).  To do this I imagine I need to start with a darker red.  Hopefully the below explains!

Ta

[Jeff Arola]

Like this?

Extracting colours with alpha

[clippingpaths]

You can this by decreasing opacity percentage.

[Lawtz01]

Hey, I dont think so.

See the below.  I think im just not explaining myself very well, dont know if this helps!

[D Fosse]

Multiply blend mode will do it.

[Lawtz01]

thanks will try multiply blend and report back!