Color
#283d80
#283d80rgb(40, 61, 128)hsl(226, 52%, 33%)oklch(0.382 0.116 267.6)Colors that go with #283d80
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 #283d80 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 #283d80'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 #283d80 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #283d80 in 3 real palettes, including Fintech Trust and Console Light, as the accent — a combination designers have actually shipped, not a computed rotation.
Sienna #a0522d
split-complementSienna is a split-complement of #283d80: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Crimson #dc143c
shippedCrimson is paired with #283d80 in two real palettes: Frost & Ember and Chase's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Royal Blue #4169e1
shippedRoyal Blue is paired with #283d80 in two real palettes: Console Light and Chase's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #283d80: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #283d80
Tints & shades
Harmonies
Contrast
| #283d80 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.15:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.07:1 | 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 #283d80 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
#283d80 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 #283d80 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/283d80-9ca1c4-df774e-221f2d-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