How about a yellowish tan I know some people on here have those....I have a yellow LR/Dr and love it, but its a north east facing room, so it needed to be warmed up. That said it took me about 10 different yellows to get the right one....intresting enough I had to go with an orange based yellow as most others came off as green. Another tip if you go with a yellow...pick the color on the strip one shade lighter than the one you like... Good luck...my favorite colors are yellow and blue...though I don't have any good light blue colors for you as mine are more medium blues. BTW, blue couch with blue walls, might make for a chilly feeling room depending on the orientation of the room.

^This. Buyers make their decision to look or swipe in seconds. They don't see past what is there.....except for people like those of us on Houzz. Truly, the vast majority can only see what is there and have great difficulty envisioning any other color/flooring/style etc. I've been a real estate agent/Realtor for well over 35 years (since 1978) and see this all the time with buyers. The other point made above is they don't want to do the work involved with painting as soon as they move in, or they have already spent their budget and don't want to live with 'colorful walls' until they have the funds to repaint. You open your whole buyer pool with neutral colors, but you don't have to stick with white or beige or gray.

No accent walls, please. They are for people who can't pick art, and/or who don't know how to choose colors which which to accessorize pillows, rugs, objets d'art, etc. The sofa, chair and bench in your photo are fine, but the throw pillow covers are a serious snooze. And please re-think gray as an accent color, it is neither cheerful nor hospitable. If you like ecru. you can have pillow covers in that color with a lot of texture, something along the lines of a cable knit, like an aran sweater. Williams-Sonoma has marvelous throw pillows to give you some inspiration. Look how great those plants look in the photo, green would make a great accent color, and you can add touches of black to ground the room and add sophistication and drama. You can have a black tray on a table, some black and green in art.

You are just starting a lifetime journey. You have done a great job selecting core furnishings and bringing everything together, but it is still a bit on the "staged home" side of the fence. The room is cohesive and nice, but I can't tell who you are, what colors you love, what your passions are. Wall color is one way to bring life to a room. Color in area rugs, art, décor, upholstery, window coverings are other ways to bring color into your space. Knowing what colors make your heart sing and then deciding how to add those colors into your home is how you can personalize the space. Same room - accent colors subdued. . . Accent Colors intensified Wall Color Added Here are a few more with and without wall color