Try the "cody" version in the new tropical fabric, they are a slimmer fit

Haggar Men's E-CLO Repreve Stria Flat Front Dress Pants. Navy color.

I purchased them on Amazon. My normal pant length is a 33-34 but needed a 31. Stretchy band and a bit thinner than M&H so great for the summer. Shade of blue matches well enough depending on what shade of blue dye your jacket is.
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that’s exactly what I have. Maybe Im just fat

I bought my first pair of AA Jetseam pants to and they are just a shade darker than the M&H blazer. It’s not noticeable in some lighting conditions, but when a bright white light or sun hits it, it really stands out. It could just be the shade of navy of my particular jacket style as well.

Honestly as soon as summer months comes back, I’m going to drop the blazer and use my Jetseam pants

Same here. My wife says there’s a very subtle difference in the color vs the MnH blazer in direct sunlight but I can’t tell the difference.

Im guessing this could also be with the non wool synthetic blend of the Jetseam pants and pants like Hagger, those rayon poly blends reflect the light.