Color
#28309f
#28309frgb(40, 48, 159)hsl(236, 60%, 39%)oklch(0.385 0.176 271.6)Colors that go with #28309f
Charcoal, 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #28309f: softer than #000 and cool enough to feel like part of the same palette.
Steel Blue #4682b4
analogousshippedSteel Blue is #28309f's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped6 real palettes, including Procter & Gamble's brand system and CVS's brand system put Blue beside #28309f, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #28309f in 10 real palettes, including Walgreens's brand system and Pepsi's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #28309f: 9 real palettes, including Warbyparker's brand system and Unilever's brand system, as the accent.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #28309f: 4 real palettes, including 3M's brand system and MLB's brand system, as the supporting colour.
Midnight Blue #191970
shipped14 real palettes, including Fintech Trust and Blue Mono put Midnight Blue beside #28309f, as that palette's text colour.
Orange Red #ff4500
shippedOrange Red is paired with #28309f in 4 real palettes, including Tide's brand system and NASA's brand system, as the accent.
Real palettes that use #28309f
Tints & shades
Harmonies
Contrast
| #28309f as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.43:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.01:1 | 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 #28309f 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
#28309f reads as cool, vivid, technical. 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 #28309f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/28309f-9e9cc4-df8f4e-241f2d-e9eef1?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