I watched a video on Youtube a few weeks ago. One from Gaijin Goomba, where he talked about Naruto's link to Bhudism through the use of Chakra. Rather educational I must say.
In the video, He shows images of Chakra points in the body and interestingly enough, the different points are represented by colors.

If you notice the Yellow chackra's location and definition, it actually makes sense. Fire and Ego, along with being located in the middle of the body. But let's take it a step further. You might be thinking, "Middle of the body, but not between the shoulder blades." and you might be right, but not every chakra chart shows the same thing.

If THIS image is to be believed, then it makes even more sense. Now you may be thinking something else. "If this is truly how it's been done ever since Goku did it back on Namek, then how did he find the right spot? Luck?" Nope. Not luck. Though not an image relating directly to chakra, I believe this may explain something.

Some of the feelings of anger generate in the lower torso region. RIght where the stomach is located. According to this image, these organs are linked to the general area of the spine where the energy must gather for the Super Saiyan transformation to occur. It would be no far stretch to imagine the energy flowing between these areas could trigger it. Or at the very least, energy gathering in the stomach region overflowing to the point of reaching the "SS trigger point".
Now you may be thinking "Okay, but if red is SSG and blue is SSB, then the power scaling is off!" except, this isn't about the placement of the colors. That doesn't matter here. Whatever is stronger, is simply stronger. Some simply are. That being said, take a look here:

Yellow:
I stand up for myself
I express myself in a powerful way
I feel my own power
Red:
I am connected to my body
I am open to possibilities
I am grateful for all the challenges that helped me to grown and transform
I stand for my values, for truth and for justice
Light blue:
I am at peace
Red SS4:
I feel deeply rooted
I am connected to my body
I have what I need
I am trounded, stable, standing on my own two feet.
I trust myself
Now for Broly and Kale, I've thought about their situation quite a bit. I just couldn't fit them into the Green color category one bit. It deals with the heart, loving and being loved. But then it struck me. They do fit, but only if some things are inverted:
Green:
I am wanted and loved inverts to: No one wants me, they all hate me
All love resides in my heart inverts to: All hate resides in my heart
I accept things as they are inverts to: I will destroy everything that annoys me
I am connected with other beings
These are still matters relating to the heart though, and as such, mesh with both of these green haired warriors, sometimes in an inverted way.
At this time, I am still working out Super Saiyan Rose, but I at least know this much. Some depictions of the Crown chakra display it as either pink or white. Why the Crown chakra is important is due to it's relationship with a sense of divinity, as Zamasu was not only a divine being, but also strongly identified himself as such. If Pink, then he need only channel through that chakra point alone, but if white, then he would have to channel through both the Crown AND Root chakra points.
It doesn't help that most of these charts are rather inconsistent. I also tried looking up some 12 chakra point charts, but they only make matters worse.
Most 7 point charts though, depict the Crown as either purple or dark purple. At which point, he would have to be using multiple chakra points for the color to be correct. And if you think about it like that, It still becomes possible, as all but the Root chakra point has an affirmation about being peaceful, which is rather interesting, because the literal translation of the word Zamasu, is "To calm down".
I would really appreciate some more input on this. I think there's too much evidence to just call it all a coincidence at this point.
