Named color
Deep Blue
#040273rgb(4, 2, 115)hsl(241, 97%, 23%)oklch(0.255 0.171 265.6)Deep Blue on this page is the real value, not a screenshot: exact hex, RGB, HSL and OKLCH, ten tints and ten shades, classic harmonies, and WCAG contrast with fixes — plus the curated palettes it appears in and any public brand that adopts it.
Colors that go with Deep Blue
Crimson, Steel Blue and Charcoal 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.
Crimson #dc143c
triadicshippedCrimson completes a triad with Deep Blue — 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 Deep Blue's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for Deep Blue: softer than #000 and cool enough to feel like part of the same palette.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with Deep Blue: 7 real palettes, including Glacier and Purina Pro Plan's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with Deep Blue: 6 real palettes, including Bank of America's brand system and British Airways's brand system, as the accent.
Royal Blue #4169e1
shippedRoyal Blue is paired with Deep Blue in 6 real palettes, including Discord's brand system and Spectrum's brand system, as the lead colour.
Olive Green #808000
complementaryOlive Green sits directly opposite Deep Blue on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Taupe #483c32
shippedTaupe is paired with Deep Blue in 3 real palettes, including Boeing's brand system and Gillette's brand system, as that palette's text colour.
Real palettes that use Deep Blue
Tints & shades
Harmonies
Contrast
| Deep Blue as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 16.65:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.26:1 | 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 Deep Blue 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
Deep Blue 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 #040273 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/040273-a19cc4-df9b4e-261f2d-e9edf1?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