Color
#0b3579
#0b3579rgb(11, 53, 121)hsl(217, 83%, 26%)oklch(0.347 0.125 260.1)Colors that go with #0b3579
Charcoal, Crimson and Steel 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 #0b3579: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with #0b3579 — 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 #0b3579'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 Alaska Airlines's brand system and Procter & Gamble's brand system put Blue beside #0b3579, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #0b3579: 16 real palettes, including Hasbro's brand system and Panasonic's brand system, as the supporting colour.
Orange Red #ff4500
shippedOrange Red is paired with #0b3579 in 6 real palettes, including Tide's brand system and NASA's brand system, as the accent.
Powder Blue #b0e0e6
shippedDesigners have shipped Powder Blue with #0b3579: 4 real palettes, including Glacier and Frost & Ember, as the supporting colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #0b3579 in 13 real palettes, including Confluent's brand system and Discord's brand system, as the supporting colour.
Real palettes that use #0b3579
Tints & shades
Harmonies
Contrast
| #0b3579 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 11.67:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.8:1 | 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 #0b3579 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
#0b3579 reads as cool, vivid, dark. 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 #0b3579 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/0b3579-9ca7c4-df624e-201f2d-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