Ionian vs Thames Fog
Ionian is a Sherwin-Williams color while Thames Fog comes from Valspar. Hue-wise, Ionian belongs to the blue family and Thames Fog to the grey family. At LRV 27 vs 20, Thames Fog will read as the brighter of the two — a 7-point gap that matters most in north-facing or low-light rooms. At ΔE 28.3, these are genuinely distinct colors — a strong contrast if used together, or a meaningful choice between two different directions. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Ionian vs Thames Fog in Real Spaces
1 real room side by side. Seeing Ionian and Thames Fog in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Bathroom
Bathrooms amplify color — the enclosed space and reflective surfaces make what reads subtle elsewhere feel more present here. The brightness difference is modest but present — Thames Fog gives the walls a little more lift.
Color Details
Ionian vs Thames Fog Simulated Comparison
5 simulated room previews — drag the slider on each to see Ionian on one side and Thames Fog on the other.
Digital color is approximate. These simulations are generated from the manufacturer's hex values and overlaid on grayscale room photos — your screen's calibration, brightness, and viewing angle all affect how they render. Before committing to either color, test physical samples in your own space under the light you actually live with.
More Ionian comparisons
See how Ionian stacks up against other well-photographed colors across different brands and tones.
