You’ll need to use the conversion formulas from Pantone and manually identify the RGB/CMYK values. Converting Pantone swatches to RGB/CMYK in Illustrator/Photoshop does not provide accurate colour conversions. For example, if you switch your Illustrator swatch from Pantone 107C to show as RGB, you get the values of 255,242,31. If you want. Red + Black = Dark Red Red + Green = Dark Yellow Red + Green + Blue = Dark Gray Red + White = Pink Black + White = Gray. then you'll need to average the values (e.g. (r1 + r2) / 2) This works better for lightening/darkening colors and creating gradients.
Like the RGB color model, CMYK is a combination of primary colors (cyan, magenta, yellow and black). It is, probably, the only thing they have in common. CMYK suffers from a lack of color shades that causes holes in the color spectrum it can reproduce. That's why there are often differencies when someone convert a color between CMYK to RGB.
To get a tint of N (where N is in the range 0.01 to 0.99; 0.01=1%, 0.99=99%): for each colour value X in RGB, take [N x X] + [ (1-N) x 255], to get the RGB value of your tint. But remember - when you convert between Pantone and RGB; or between Pantone and CMYK, you're going to change colours a bit. Every time.
The above code gives me excellent results for both JPEG and TIFF images, although I happened to get a very strange result with a particular image. Here is another, much simpler and straightforward, way by JMagick: ImageInfo info = new ImageInfo ("cmyk.tif"); MagickImage image = new MagickImage (info); image.transformRgbImage (ColorspaceType
In the above Pantone to RGB Converter, you can choose the required Pantone color from drop down menu. When you select any one PMS color say, Warm Red C, the PMS Color Converter converts to RGB Code. Red as 249, Green as 66 and Blue as 58. An online PMS Color Converter to find the exact RGB color. Pantone is a parent company of X-Rite. . 159 239 115 199 370 169 282 167 201

convert cmyk to rgb formula