Looking for (approx) RGB equivalents for Gel colors
- Thread starterJChenault
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CrazyTechie
Well-Known Member
On derekleffew's website there is a reference chart that I have used before, it works rather well. Reference Documents
The websites for all of these manufacturers have the RGB scales for all thier colors. If you're an IPhone user the Iswatch app is very handy for side by side comparisons.
A long time ago, maybe 1992/93, I attempted to write a computer program to display gel colors to aid in selecting colors when designing shows. At the time, I called a few gel manufacturers and even talked to an engineer who explained Chromaticity to me. It ended up resulting in a fairly straight-forward math equation in my BASIC program and it had to do with colors changing based on intensity (and this being a way to overcome that factor). I wish I could remember it all, sadly I got side-tracked and never completed the program but I did have it working. I'm not sure if anyone has broken all the various gel colors down to RGB but at the time I was told that wasn't the way to go based on the fact intensity (and other factors) affected the final color. Understand Chromaticity and you'll be able to calculate colors at any intensity, or at least that's the conclusion I came to...
Jack
Jack
bishopthomas
Well-Known Member
kensmithld
Member
MikeWood
Member
As a first approximation (which is all the charts are for anyway) set Amber to the same value as whichever is lower of Red and Green.
Mike
MikeWood
Member
Yep, that's me.
jlouisstahl
Member
Here's what I've commonly found, because all the fixtures that use RGB values come from so many different manufacturers, your values differ from fixture to fixture from manufacturer to manufacturer. Lets use an LED PAR for example. One manufacturer will produce a LED PAR that has a certain look for R @ 50 , G @ 36 , & B @ 72 (kind of a lavender, very pretty!) while another LED PAR that comes from another manufacturer has a slightly different look for those same values. Basically what that says is that the manufacturers who make your gels (rosco, lee, etc.), can give you the closest RGB values that will create that gel color, but it's simply impossible for them to compensate for the difference from fixture to fixture. My recommendation, use the values that they give you, but don't stop there. Manipulate them a little more to get the colors as close as possible. The iSwatch app is very good though.
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Alex Potter
Member
This is as far as I have gotten. The data is all sourced from Rosco's website. It has about 900 gels with color names and hex values. The hex values can be easily converted into RGB decimal values.
I am missing a lot of the Lee values, so if anyone sees anything close to a representation of them on the internet in color, I can grab the information off the website.
I am missing a lot of the Lee values, so if anyone sees anything close to a representation of them on the internet in color, I can grab the information off the website.
Rosco's E-Colour is an exact copy of the Lee Filters line, so just use those values.
As referenced in post#3 above, http://www.derekleffew.com/referencedocumentsandwebsites/AllGels2-RGB.xls?attredirects=0 originally came from, IIRC, someone from Color Kinetics. I just made the spreadsheet more user-friendly.
Alex Potter
Member
The referenced one seems to only have the ones they state in the conversion charts - is that correct? Attached is an export of all 907 gels referenced on https://www.rosco.com/mycolor/mycolor.cfm that I got by parsing through the html on the page.
It only has the Gel # and the Hex value for the color, but it should be able to supplement the ones that yours doesn't include like some of the common gam colors.
It only has the Gel # and the Hex value for the color, but it should be able to supplement the ones that yours doesn't include like some of the common gam colors.
Ben Dickmann
Product Manager, Chauvet Professional
When we launched the Ovation C-640FC, we added a "virtual color wheel", I sat in our lab for about a week working with the fixture and a 650W Cyc Cell and some Rosco Gel and a spectrometer to match the X/Y values as close as possible. The colors we selected were based on input from attendees at USITT a couple years ago, and a couple other places. These are specific to our fixture and the wavelength of LEDs we use, which if you are looking for exact matches may mean that your "recipe" will vary from fixture model to model because of different LEDs being used.
So, this may be some help, it may not...It's actually for an RGBAW mix.
So, this may be some help, it may not...It's actually for an RGBAW mix.
Dionysus
Well-Known Member
*gasp* you are missing some Roscolux colours... R03, R05 for instance. ;P how is that possible? lol
And of course Ben is right that RGB or RGBAW or whatnaught values will vary by fixture, etc.
However this could indeed be a handy thing for people indeed. Thankfully consoles like the ION have all the normal GEL selections included in them which is great.
And of course Ben is right that RGB or RGBAW or whatnaught values will vary by fixture, etc.
However this could indeed be a handy thing for people indeed. Thankfully consoles like the ION have all the normal GEL selections included in them which is great.
Ben Dickmann
Product Manager, Chauvet Professional
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