Which one is right?
Neither. For all intents and purposes, RAL colors are realworld colors (as in FS colors for paints), not even print-specific spot colors, so anything on screen can at best be an approximation. Safety orange cannot be simulated properly, anyway. It's a reflective luminescensce color just like DayGlo orange.
Meanwhile, RAL colors are defined by Lab = CIELab values.
A subset can be found here:
Ignore the unspecified RGB-values, use only Lab. I didn't check
the Lab numbers.
Whether a RAL color is out-of-gamut in any other color space
can be tested by Photoshop:
Make New doc1 in Lab
Specify foreground color by Lab values
Duplicate doc1 --> doc2 for a comparison
Select doc1 for soft.proofing
View > Proof setup (choose any RGB or CMYK space)
View > Proof color (for a visual comparison of doc1 and doc2).
If the color is out-of-gamut for the monitor (maybe near to sRGB),
then the test is not reliable. If differences are observed, then this
indicates problems to be expected.
View > Gamut warning (out-of-gamut in target space is indicated
by an alarm color of your choice). This is a reliable test, but it's
sometimes too 'strict'.
RAL colors are defined for varnish in 'real world'. Like for any other
real world colors, a description by CIELab is well suited (except
for fluorescent colors and colors with other effects like metallic).
Search further (Google) by both words 'CIELab' 'RAL' simulta-
Complete color bases with varnish samples and data systems
for Lab, including newer developments like RAL Designer may not
be available for free.
Best regards --Gernot Hoffmann
According to the link in my recent post, Signal Orange RAL 2010
has Lab values L=54.2, a=41.4, b=46.2.
This is in-gamut for sRGB and for the common offset color space
ISOcoated-v2-eci (or just ISOCoated, doesn't matter).
It's a rather dull orange!
Color software as mentioned by Monika Gause (1), by me (2) or
isn't necessarily compatible with Photoshop or Adobe CS#.
Adobe CS# uses for the CIELab conversions the CIE standard
observer 2° and reference light D50. The mentioned color software
uses at least definitely in case (3) the 10° observer with reference
This post is more a case for the color management forum.
Sorry for bothering the folks here, eventually.
Everything could be fine, if I didn't measure RAL 2010 in my
real world RAL swatch book. Here I found by two instruments the
value b=60, approximately - instead of b=46.
Best regards - Gernot Hoffmann
Thanks Gernot and others
. I need to do some research to figure out what you are talking about,
but I appreciate the response. :-) When I get over the hump, I'll have time to do that. I do get that RAL does not neccessarily lend itself to digital, I'll cope.
The color RAL 2010 is specified in ISO 3864-2 Annex E as the safety orange. I am writing/illustrating an equipment manual and need to format safety notices for the text. (pictograms drawn in AI).