RAL Classic colour fan deck
You are currently browsing RAL colour chart containing 215 classic colours.
White & black Hues
RAL Colour 9004
This RAL 9004 Colour is presented to you as a part of white and black hues assortment on the RAL Classic colour chart. You will notice that all of these grouped colours follow this specific designation, which is based on four-digit number in combination with the letters "RAL". This is why white and black colours are sequentialy coded under 9xxxx, where 9 is a system code number (1: yellow, 2: orange, 3: red, 4: purple, 5: blue, 6: green, 7: grey, 8: brown and 9: white and black shades).
The name Signal black actually serves as additional, auxiliary designation, making the colour easier to remember. This naming system also provides additonal quality assurance preventing erroneous colour assigment due to number transposition.
On this particular hue range, in addition to 'signal black', you will find hand-picked colour tones selected by RAL institute design experts. This white and black colour assortment holds another 13 excellent tones (making a total of 14 unique colour samples). You can click here for a list of white and black hues, or open a full chart of 215 RAL Classic colours.
◾ RAL 9004 to CMYK
In the CMYK colour system the RAL 9004 is composed by combining four primary tones of pigment. To achieve this exclusive "signal black" colour tone, out of 100% maximum colour components, 35% cyan, 50% magenta, 40% yellow and 90% key (black) are used.
You can immediately see this result on this computer simulated CMYK diagram.
The mixture of these primary colours blends in the middle on a square space where all four different colour hue sheets overlap.
◾ RAL 9004 to RGB
The conversion of RAL 9004 into RGB colour space requres specific composition of red, green, and blue primary colours.
To construct hue matching "signal black" colour from the RAL chart as close as possible, we use the following values ranging from 0 to 255 on the RGB colour system: 43 red, 43 green and 44 blue.
The three circle RGB diagram here provides illustrative example showing how these relatively low values comes together and constructs such dark, yet unique shade of colour. The RAL colour equivalent emerges in the very center, where all three primary colour circles overlap and combine.