Atomic Systems

Does anyone know the correct rgb value for the yellow warning ends used on the Intercity livery.
photo's seem to show it as a nice full bodied yellow but on a lot of models
it seems to be more of a gold colour.

It will most likely be in CMYK rather than RGB. RGB is a computer system, while CMYK is used in print and paint matching.

nestfilms wrote:Does anyone know the correct rgb value for the yellow warning ends used on the Intercity livery.
photo's seem to show it as a nice full bodied yellow but on a lot of models
it seems to be more of a gold colour.

Have a look at http://www.3dtrains.com/guides/msts_col ... ndex.shtml

though at the end of the day, its what you feel looks right that matters.

Regards,

David Varley

This is common knowlegde in our pub......


Front End Colour

5.1 General
With the exception of steam locomotives the forward facing front end of the leading vehicle of a train shall display an area of yellow colour meeting the requirements of section 5.2.

5.2 Detailed Requirements

(a) The Front End Colour
The colour shall be yellow as specified by the following CIE(L,a,b) indices:
L = 73.4 ± 2.6, a = 21.6 ± 2.5, b = 69.9 ± 0.7
Note: The CIE(L,a,b) system is the paint industry method of defining colours.

(b) Area of Yellow
Except as indicated in sections 5.1, 5.3 and 5.4 and except where the vehicle has an end gangway, there shall be a minimum forward facing continuous area of yellow surface as indicated in Table 1 when viewed, at a large distance, head on from in front of the vehicle. It shall be permissible to divide the yellow surface by elements of an end gangway if necessary. In this case each section of a divided yellow surface shall have a substantially uninterrupted yellow area not less than 0.4m², with a minimum dimension as indicated in Table 1.

Vehicle maximum speed Minimum area of yellow warning
panel*
Minimum dimension of yellow warning panel*

up to 200km/h 1.00m2 0.60m
200 – 225km/h 1.24m2 0.70m
225 – 250km/h 1.53m2 0.80m
250 – 300km/h 2.21m2 1.00m

* Where the minimum required area or dimension exceeds that which is
available on the front-end of the leading vehicle of the train, then the yellow warning panel shall be provided over the maximum practicable area (not including active optical surfaces, e.g. windscreen, and head, marker and tail lamps).

rikfarish wrote:The colour shall be yellow as specified by the following CIE(L,a,b) indices:
L = 73.4 ± 2.6, a = 21.6 ± 2.5, b = 69.9 ± 0.7

So what shade of yellow is that then?

Having put that into a graphics program that can handle Lab colour and not using any of the allowed variances it creates a colour that has the RGB values of 238.162.36

In comparision the 3d trains link gives 216.163.2 so at the end of the day it's personal preference and what looks right as the paint is going to take a battering in traffic and change with age any way.

With any question of livery, the colour would vary very much over time - fading, weathering etc, so if you choose a colour that looks right to you and looks similar to colour photos then it is right

saddletank wrote:With any question of livery, the colour would vary very much over time - fading, weathering etc, so if you choose a colour that looks right to you and looks similar to colour photos then it is right

except of course where you have to get the correct lab indice, RGB value or indeed dulux paint sample card for a tartan paint.......