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A marigold seat and snowy glass can make a winter sunroom feel warmer before you even touch the throw. The seat has enough color to stand up to plum and teal velvet, with a fringed cream layer and a small paperweight bringing the pale winter light back into the room.

This image was created with AI as decorating inspiration.
Find the useful seat first
Sit at the place you use most often and notice where your back, arms and feet land. Keep that part free when you arrange the pillows. If you usually settle in at the right end, shift the largest pillow to the left, where it can support a second person or hold the folded throw.
A bench cushion in warm yellow establishes a broad field of color. Look for a removable cover if the seat gets regular use. If you want to work with upholstery already in the room, put the marigold into a seat pad or a folded quilt and choose a warm cream for the pillows nearest it.
Pair plush colors that read at a glance
Plum and teal have deep shadows in cut velvet. In bright snow light, the pile can look pale along one edge and almost black at the other. Turn both pillows around as you set them out and choose the side that makes the pattern easiest to read.
Put the busiest fabric at an end where you can see the whole face. Use a quieter fabric in front of it and keep similar colors at different heights. That gives the bench a sense of layers without filling every inch of seat. Take one pillow away when the room is in regular use if the remaining ones support you better.
Add a pale texture
Cream fringe gives the window seat a bright break between blocks of saturated color. Fold the throw in thirds and let a little of the texture show over the end of the cushion. Pick it up and put it back with one hand to test how it behaves. A big complicated fold will be more trouble than pleasure.
If the window has a radiator or vent below it, keep the blanket clear of that area and move the footstool where you can reach it from the seat. The center of the sunroom can stay open while a small, rich patch of color does the decorating.
Give the daylight a place to land
A clear faceted paperweight on a closed book catches winter light. Place it toward the center of a sturdy side table so it has room around the edge. Use the open space for your reading glasses or a cup. A table with a useful lip is especially welcome beside a deep cushion.
Snow light can be quite directional. Move the clear object an inch or two until you see the bright edges from the doorway. Then sit down and make sure the light falls where you can read comfortably. A shaded lamp can take over after the windows go dark.
Use the look beyond a window seat
A short upholstered bench beside a glazed door can do much the same job. Put a single strong velvet pillow at the wall end and use a stable low table for your book. Keep the door swing, handles and normal walking space clear. A fern near the far window gives a touch of life without covering the snow view.
Use the view and the floor as part of the palette
The snow already gives this room a wide field of pale color. Try leaving the largest panes unobstructed and putting the densest color below the sill. That makes the bench look even warmer and keeps the outdoors readable. If the room faces a fence or a neighboring window, set the tallest fern at the far side of the seat. Its outline can screen a small part of the view and help the open glass feel framed.
A patterned rug can carry the teal beyond the pillows. Put the front feet of a nearby chair or table on a stable part of the floor and keep the rug edges flat. A pattern with a little rusty red can make a raspberry footstool feel related to the marigold upholstery. If you have a plain rug, a smaller patterned cushion can supply that connection from a seat opposite the window.
Make the textures work in more than one light
Velvet faces can look remarkably different when you flip them. Place two cushions on the bench and walk to the opposite end of the room. Turn one so its pile looks a little paler and see whether both colors stay distinct. Use the deeper one in front of the yellow cushion if you need more contrast. If your pillow covers have a pattern, check which direction the pattern feels most natural when you are sitting nearby.
A thick knit and a short cut velvet give you two kinds of texture. Try putting the fringed edge of the throw toward the middle of the bench while the folded bulk sits at the end. From the doorway you will see the part with the most movement. From the seat you can reach the folded edge and pull it over your lap without moving the pillows.
Set up a small winter reading tray
A tray can collect a few small things on the side table if you share the room. Put your bookmark and glasses toward the front and keep the paperweight on the book behind them. A shallow tray with a simple rim is easier to see in the low light than a deep basket. Wipe the base of the glass before you set it on the book, especially if the room holds plants that are watered nearby.
The table’s position makes a difference to how inviting the seat feels. Bring it toward your elbow and see whether you can turn a page or put down your glasses without standing. Then walk around the table as you would when you leave the seat. Slide it toward the window side if it sits in your walking path. A few inches can make both the bench and the neighboring chair more useful.
Once you like the arrangement, take a look in the morning and again toward dusk. You may choose to move the paperweight nearer the lamp once the snowy daylight fades. The light that makes the colors easy to see is part of the decoration.
Look for pieces you will handle every day
Marigold bench cushion
Measure the flat seating area and look for a cover you can remove.
Cut velvet pillow covers
Look at the fabric in both daylight and lamplight if possible.
Cream fringed throw
Choose one you can lift and fold easily from the seat.
Stable side table
Check the height against the cushion while seated.
Faceted paperweight
Choose a smooth base and set it where it can stay well inside the table edge.
Upholstered footstool
A modest footprint gives you a place for your feet and preserves the walking lane.

Final Styling Tip
Let the cream throw touch the yellow cushion and one deep plum pillow. That short run of pale fabric ties the rich colors together and makes the spot look ready to use.