Muslin and Ivory Porcelain are both pretty, but more brown.

Here are some I found. I thought Monterey White And Navajo White were more yellow than they are. Of these I like Ludwell White, Man on the Moon, and Ivory Lustre.

Hi - Both Montgomery White & Muslin sit towards the middle of the Yellow Hue Family, at 87.59° and 88.24°, respectively.

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Montgomery White has not far off double the Chroma of Muslin, so will hold on to that bit more colour under the bleaching-out effects of full-on, searing sun. Or in other words, Muslin is nearer to neutral than Mongomerey.

Both are pretty, it just depends upon the effect you are hoping for. Muslin also has a Lightness value of 85.45 compared to Montgomery at 89.68. (Out of 100) So it is just a few points less bright than Montgomery.

Ivory Porcelain lives past the centre of the Yellow Family, heading over towards the next Hue Family of Green-Yellow at 94.43°. It has a Lightness value of 87.28, so sits between Muslin & Montgomery. In terms of Chroma it also sits between the two.

Navajo White 947 is lighter than the other 3 with a Lightness Value of 91.25. It is also the more neutral of the 4 colours With the least amount of Chroma. It sits nearest to the centre of the Yellow Hue Family at 92.25°

Are there any other fixed finish materials on the exterior which might direct you to which type of Yellow would work most happily? Wood trim? Stone Terrace etc? And perhaps decide if you are looking for a definite colour to hold its own in the sunlight or something just to take the edge off blinding-whiteness?

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As this person has discovered, you can afford to to have a colour a little darker and more chromatic, if you still wish it to appear a definite colour in full sun.

Thank you for the great ideas. We are using an white oceanic color cast stone for the window and door trims. Husband likes lighter shade, though he is open to more options. Window trim will be dark color. I also like some of the lighter brown shades -so want to try many samples on the wall so we can pick one.

What a lovely dilemma to have! Give me a shout if I can help. Good Luck! 🌈