Am colour blind, need help identifying bands

[Tim88]

Howdy, could use a little colour identification for you colour see-ers  . Have three inductors to identify, hopefully someone can lend a hand, or an eyball...
Thanks!

[Zoli]

L1=L2=11µH
Third one=68µH
Edit: All tolerances 5%

[Benta]

Agree on 68 uH, but not on L1/L2.
They could be 22 uH (most likely), but 33 uH is also a possibility. The green base colour combined with the modern semi-opaque stripe colours is terrible. That also goes for resistors. It's a guessing game nowadays.

[pcprogrammer]

My initial reaction was brown brown black, but Benta might be right that it is red red black. Orange I don't think so.

[SiliconWizard]

I vote for brown too here.

[magic]

I would hope that a 33 wouldn't look that red, so it's 22 or maybe 11.

11 isn't a standard value until you get to E24, not sure if they make E24 inductors?

edit
Are there any other inductors on this board for comparison?

[Tim88]

edit
Are there any other inductors on this board for comparison?

Just those three.

[Benta]

Believe me, modern resistors (and inductors) with blue or green body colour are a nightmare since years. The stripe colours are almost unreadable, probably due to some RoHS demand resulting in low colour saturation.
If you'd like a nice quiz, I'll take some photos tomorrow in daylight and let you decode the resistor values.
It'll be fun to watch.   

In this case, I'll stick with 22 uH. Red+green=brown.

[Tim88]

I took a pic outside in daylight, any better?

[nctnico]

I vote for red (22uH). But if you want to be absolutely sure, desolder one and use an LCR meter.

To the OP: you can import the photo into a paint program and look at the RGB values of the colors and see what matches best with these color values: https://people.duke.edu/~ng46/topics/color-code.htm

[JohanH]

I have a bit of red-green color vision deficiency (that's not blindness!) and I can see that it is more red, although it looks a bit brownish. Gimp tells me #9a584a from a random point, which is a shade of red (60.4% red). So 22 µH.

[David_AVD]

I reckon 22 (not 11) too. I hate it when they use a red that's bordering on brown, or orange that's bordering on red.

[mc172]

It looks brown to me, especially when compared to the red in the bottom of the 2nd picture.

[hans]

I vote for red (22uH). But if you want to be absolutely sure, desolder one and use an LCR meter.

To the OP: you can import the photo into a paint program and look at the RGB values of the colors and see what matches best with these color values: https://people.duke.edu/~ng46/topics/color-code.htm

Also looks 2x red to me.

That 2nd tip exactly my thoughts as well. Digital devices aren't handicapped.
I've Myopia (pretty common) with strength -4 ish (can't read anything more than a foot away). When relaxing I am tired wearing glasses, so I put them down.. but occasionally I do need to check things in the distance.

Mobile phone to the rescue. I hold it right in front of my face with the camera app (with small/wide angle sensor views) and occasionally some digital zoom to get an idea about what's going on there in the far distance.. works great. I imagine computer color probing can be similarly useful.

[David_AVD]

It looks brown to me, especially when compared to the red in the bottom of the 2nd picture.

That's the problem in real life though, the colours are never as clear cut as any data sheet depiction or computer generated chart.

[EPAIII]

This conversation makes me wonder if there may be a need for some kind of color recognition device. Not just for resistors/inductors or other electronic devices, but more general. Perhaps something that could be built into a pair of glasses.

But then, perhaps that already exists. I don't have time to do that search.

[NiHaoMike]

Place a sheet of white paper off to the side (and in view) so that the color balancing will work.

This conversation makes me wonder if there may be a need for some kind of color recognition device. Not just for resistors/inductors or other electronic devices, but more general. Perhaps something that could be built into a pair of glasses.

That does exist, it's called a color filter.

[magic]

I took a pic outside in daylight, any better?

Yes, I am now starting to wonder if the second inductor could be 221 rather than 220

(But it really looked identical to the first on the original picture, so I think they are the same).

[ivaylo]

Just measure them. This system is ridiculous. I have the red/green deficiency too and always thought people with normal color vision just see stuff where I usually stumble. Thanks for this thread…

[magic]

It's easier when you have the device in front of you and can compare it with other stuff on the board and try a better light.

In comparison, decoding markings from somebody's single small picture is like reading tea leaves.

[JohanH]

I've been curious about those "color blind" correction glasses that are touted online, but I haven't bothered when they are all made with tinted lenses (and I would like to use them inside). They supposedly improve color contrast and I'm sure that in theory that could work, unless you have a total lack of color perception. With good lighting I anyway see the difference, so for me they wouldn't be a big benefit anyway.

[pcprogrammer]

In the second picture you can see that the colors are bleeding in the edges and changing color. At least I can on my system.

The red in the second picture to me is indeed red, but near the edges it is brown due to the bleeding.

The black ring seems to show some brown in the middle and bleeding to black in the edges so the value might well be 220uH.

De-soldering and measuring seems the best option to get to the truth.

[Ed.Kloonk]

I wonder if some color filters used in image manipulation software could reveal the markings.

Do the resistor codes have any sort of standard color palate spec like international flags do?

If you present the inductor or resistor in front of a known color temp light source, the code colors should fall between certain ranges, shouldn't they?

What about color-blind apps for the phone. Do any of them help?

[Kleinstein]

For good color recognition it helps if there is also quite some white the picture - cameras may adjust the white balance and this can cause additional difficulties / skews for the whole picture.

In the 2nd picture, at the lower edge there seem to be some brown/red capacitors, like the red Wima ones. This may indicate a poor white balance (or tinted light) in the picture.
The 2nd picture with daylight still is preferrable over indoor LED of CFL light that can also cause errors in the color perception. It likely does not apply here, but the purple / deep blue part can be a problem for electronic sensors / cameras.

It is hard to tell, but given that 11 µH would be an odd value I would guess more like 22 µH.

The part below looks more like a 68 Ohms resistor and not an inductor.

The color look boarderline, more brown than red. So a color regocnition app on a phone would not really help.
I don't hink there are strict standards on the colors, more like ROHS limitations that prevent some pigments (e.g. Hg containing red). red paint is often relatively transparent, so that the green background could effect the color.

[magic]

Yes, it's hopeless.

Look at the second picture and the third band of L2 appears brown when compared to the black on the resistor below.
Look at the first picture and they are more similar.

So which picture is true?