Color
#284b8a
#284b8argb(40, 75, 138)hsl(219, 55%, 35%)oklch(0.421 0.113 261.1)Colors that go with #284b8a
Sea Green, Steel Blue and Blue 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.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #284b8a — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Steel Blue #4682b4
analogousshippedSteel Blue is #284b8a's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped4 real palettes, including CVS's brand system and Procter & Gamble's brand system put Blue beside #284b8a, as the supporting colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #284b8a: 4 real palettes, including Blue Mono and Gopro's brand system, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #284b8a in 11 real palettes, including Amazon's brand system and Codecademy's brand system, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #284b8a: 5 real palettes, including Campbell's's brand system and Nintendo's brand system, as the supporting colour.
Midnight Blue #191970
shipped13 real palettes, including First Snow and Microsoft's brand system put Midnight Blue beside #284b8a, as that palette's text colour.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #284b8a: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #284b8a
Tints & shades
Harmonies
Contrast
| #284b8a as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.52:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.46:1 | 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 #284b8a 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
#284b8a 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 #284b8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/284b8a-9ca5c4-df664e-211f2d-e9f0f1?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