I've been going back to that last scene in 5x14, and I kept obsessing about the clothing, because to me those brown colors provide a sense of comfort and familiarity.
When I was a kid, I used to go horseback riding with my dad and sisters, I loved the settings, the people, the horses. There was a sense of peace at the ranch and out on the trail.
Brown was apparently unintentionally a dominating clothing colors on those days of visiting the ranch and I never really paid attention to it, until I watched Buck and Eddie's scene, and didn't understand why the colors of the clothes they wore provided such feelings from me.
So I went and checked, and according to this site,
Brown is the color of safety, security, and material wealth. It means stability, structure, and support.
It is the color of physical comfort, simplicity, and quality. The color of physical security and the accumulation of material goods.
It promotes a sense of belonging, especially to a family and friends. It is friendly and approachable, faithful and trustworthy, dependable practically and realistically.
The psychology of color treats brown as sincere and genuine. It refers to the diligence and reliability.
These are all things we can recognize in both man, when it comes to each other. In this case specifically this is Buck, being all these things for Eddie.
Eddie is wearing the brown jacket, Buck's plaid jacket has brown woven into the other colors.
Buck is there to help Eddie, to offer comfort, someone to lean on, and give a new perspective, one that will provide clarity and a clearer direction.
It is sensual, sensitive, and warm, practical, and meaningful and represents a healthy heart.
I highlighted the sensual, as well as the healthy heart, because Eddie knows his heart, it's Christopher and Buck.
And both men have displayed sensuality with each other, if it's the way the seamlessly work and move around each other, if it's the way they give each other the heart eyes we all rave about, or even about the way they talk about one another to others.
It is materialistic because it promotes quality. Brown, together with green, is the predominant color on our planet. It offers comfort and stabilization, while the green color provides balance and youth. It isn’t carefree and spontaneous, and it does not like surprises. Therefore, it may seem dull and uninteresting for many.
Buck is stability for Eddie and Christopher, just like they are to him. Apart, they tend to spiral. And we can see that when Buck finds Eddie in 5x13, Eddie is wearing green.
Having just found out what happened to his army buddies. He wasn't prepared for it. It was too much.
Buck brought back balance. The two have an uncanny talent to balance each other out.
Some shades of a brown color show a certain degree of sophistication and elegance.
Buck is crazy smart, there is no way he didn't know what that assignment meant, he drew the heart to get a smile out of Christopher or Eddie, probably both, since he did leave the drawing on the table for Eddie to find.
It is the color of the structure, although, in no way, it encourages perfectionism, tidiness, and organization.
The psychological meaning of brown may vary, depending on the colors that mix and form brown.
Buck keeps the structured routine for Christopher, as he also helps Eddie into a routine, managing the schedule as Eddie gets much needed sleep and keeps going to therapy.
This time when he comes back from therapy, Eddie trustingly asking Buck "I'm supposed to feel better at some point, right?"
Favorable properties of brown are good quality, practical, affordable, stable, reliable, protective, sensual, sensitive, warm, reassuring, honest, sincere.
All very Buck and Eddie qualities in the last two plus seasons, and it only gets more profound with time.
This, here, is Buck being all these things for Eddie, and Eddie taking his lead and letting Buck guide him through this unfamiliar territory he found himself in.
In 5x14 we see progress, Buck's words succeed where Frank's didn't quite hit the mark.