Color
#28397b
#28397brgb(40, 57, 123)hsl(228, 51%, 32%)oklch(0.37 0.114 269.3)Colors that go with #28397b
Powder Blue, Steel Blue and Dark Olive Green lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Powder Blue #b0e0e6
shippedPowder Blue is paired with #28397b in 4 real palettes, including Glacier and First Snow, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Steel Blue #4682b4
analogousshippedSteel Blue is #28397b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Dark Olive Green #556b2f
complementaryDark Olive Green sits directly opposite #28397b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Cadet Blue #5f9ea0
shippedCadet Blue is paired with #28397b in 3 real palettes, including Open House and Coastal, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Sky Blue #87ceeb
shippedSky Blue is paired with #28397b in 3 real palettes, including Harbour and Dusty Blue, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Slate Gray #708090
shippedSlate Gray is paired with #28397b in 3 real palettes, including Ink & Paper and Dusty Blue, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Sienna #a0522d
split-complementSienna is a split-complement of #28397b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #28397b: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #28397b
Tints & shades
Harmonies
Contrast
| #28397b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.71:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.96:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #28397b as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
#28397b reads as cool, modern. The font library is tagged with the same vocabulary:
Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #28397b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/28397b-9c9fc4-df7c4e-231f2d-e9eff1?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md