I have a jpg of a logo and I need to match the colour exactly so I can blend it in with the website background colour. I have tried degraeves colour palette and also colourhunter and whilst I have a very close match, you can still see the slight difference between the two colours I am trying to pair. If there is not another way then I will have to create a transparency of the logo and then add the close match colour back in, but I don't want to do that unless really necessary.
Try to open your jpg logo with an image manipulation program (ie: Photoshop, GIMP ... ) and catch the hexadecimal value (ie: red is #FF0000 in hexadecimal) of the background color with the dropper tool.
Yes, getting the hex value and applying it to your background should do the job. If you still have problems, maybe the logo doesn't have the exact same colour throughout all it's surface...? If you still have problems, just post a link!
perhaps the colour you are trying to replicate is outside the colour space of the image you are trying to edit. I would recommend checking if the image contains a colour profile or if you are perhaps trying to match cmyk colour with rgb in which case the colour could be outside the gamut of the images colour space.