RAL Classic colour fan deck

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RAL Colour 7040

◾ Conversion chart
HEX #9DA3A7 (More info)
CMYK 20 / 10 / 5 / 35 (More info)
RGB152 158 161 (More info)
RAL 7040

Window grey

This RAL 7040 Colour is presented to you as a part of grey 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 grey colours are sequentialy coded under 7xxxx, where 7 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 Window grey 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 'window grey', you will find hand-picked colour tones selected by RAL institute design experts. This grey colour assortment holds another 37 excellent tones (making a total of 38 unique colour samples). You can click here for a list of grey hues, or open a full chart of 215 RAL Classic colours.

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RAL to CMYK conversion chart

◾ RAL 7040 to CMYK

In the CMYK colour system the RAL 7040 is composed by combining four primary tones of pigment. To achieve this exclusive "window grey" colour tone, out of 100% maximum colour components, 20% cyan, 10% magenta, 5% yellow and 35% 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.

C M K Y 20% 10% 5% 35%

◾ RAL 7040 to RGB

The conversion of RAL 7040 into RGB colour space requres specific composition of red, green, and blue primary colours. To construct hue matching "window grey" colour from the RAL chart as close as possible, we use the following values ranging from 0 to 255 on the RGB colour system: 152 red, 158 green and 161 blue.
The three circle RGB diagram here provides illustrative example showing how blue value stands out slightly in comparison to red and green to construct this unique tone of colour. The RAL colour equivalent emerges in the very center, where all three primary colour circles overlap and combine.

152 158 161 R G B
Real life application

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RAL Classic Yellow shades

RAL Classic Yellow Chart

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RAL Classic Orange Chart

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RAL Classic Red Chart

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RAL Classic Purple Chart

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RAL Classic Blue shades

RAL Classic Blue Chart

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RAL Classic Green shades

RAL Classic Green Chart

Click to see all 48 green RAL colours
RAL Classic Grey shades

RAL Classic Grey Chart

Click to see all 52 grey RAL colours
RAL Classic Brown shades

RAL Classic Brown Chart

Click to see all 40 brown RAL colours
RAL Classic White and Black shades

RAL Classic White and Black Chart

Click to see all 20 white and black RAL colours