Cross section

What you are perceiving as yellow ‘undertones’ are inherent to these colours. They all belong to the Yellow Hue Family. Hue - tells you where it sits in that Hue Family. (See the wheel above) Value - tells how light or dark it is. The higher the value, the lighter the colour. Chroma - the lower the number, the closer to neutral. The higher the number = the more colourful a colour it is. You are reading more peachiness in Sand Beach, as it sits over that bit nearer to the Yellow-Red Hue Family than the other two colours. In your lighting you are seeing peachy overtones. So you need a colour at the same position as Relaxed Khaki or further clockwise away from that zone. Rice Grain you still read as too yellow, even though it has lower Chroma (colourfulness) than Relaxed Khaki. So you need a colour with even less Chroma than 1.67. Trying to ‘just lighten’ Relaxed Khaki in store is a gamble. All the elements, not just the Value can alter. You might like the result and you might not. But you will have bought it then anyway,,,🤷🏼‍♀️ Do you want something as light in Value as Rice Grain or something between it and Relaxed Khaki in terms of Value? Getting a custom mix could really be the last resort and only if such a colour as you hope for, doesn’t exist in any collection.

If you turn the bed how does that affect the tv? In general I like the idea of it and I'm always moving things around so you'll never know until you try! I feel like the white is too stark if what you're trying to do is make it more calming. If you wanted to leave the rug maybe make your accent pillows and bedding a pretty taupe then definitely add greenery. All the strong colors seem to be competing a bit. I'm totally not a pro but I seem to struggle a lot with the same thing and adding some natural elements to my rooms have definitely improved them. You really do have a beautiful space!

Finished the project by adding some floral plants.