Getting the original colour

Hi

I've got a bitmap image and I forgot to save the psd...

Anyway, on the bitmap is a certain colour which I got by changing the opacity of the original layer which had this colour.

Now, I want to get the original colour - before the opacity change. Is there a way I can calculate this? I really need the precise colour.

Hope I made sense.

Thanks

I'm not sure that that is possible...sorry that I'm not much of a help. Next time, when you need to preserve colors, you should save them as swatches, so even if you lose the layers you can easily find the color.

Thanks for the tip

I'm sure that there is a way to calculate this...I mean photoshop using algorithms to make opacity...so there must be a numerical way to reverse opacity.

Do you have a sample of the original color?.. How do you know its the original anyways if you do find it?

Anyways, maybe with just some luck, you didn't change the color on one pixel in the image, so zoom in 1600% and find that color.

I'll know that it is the original colour when I change the opacity of that colour to 50%, which should match the colour that I have now. I can't zoom in and get the original colour since there is no pixel of that colour left.

However, thanks for helping me - much appreciated. I've actually managed to get the original colour by playing around and trying to remember how I got the original colour in the first place - took a while though, but in the process I learnt quite a bit

Care to share?

Yes sure, sorry

Basically I started with the darkest colour, i.e. black and then filled a small section of the layer with that colour. Then I changed the layer opacity to 50%. It looked similar to the original colour...but not too similar. Then I realise that there's actually a pattern - scan line type pattern. So I created another layer - and filled an equivalent section with my scan line pattern which I had saved and then set the appropriate opacity/blend settings. I had taken a note of these so I knew what settings etc - I just forgot to take note of the original colour and steps! So I merged the two layers and then desaturated the final layer - and bingo it gave me the correct pattern/colour.

Basically, I was re-tracing my steps - thinking back and playing around to see what would most likely give me the final pattern I want and from that I get my original colour and steps.