Color
#1815bc
#1815bcrgb(24, 21, 188)hsl(241, 80%, 41%)oklch(0.378 0.237 267.7)Colors that go with #1815bc
Olive Green, Midnight Blue 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.
Olive Green #808000
complementaryOlive Green sits directly opposite #1815bc on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Midnight Blue #191970
shippedMidnight Blue is paired with #1815bc in 3 real palettes, including Blue Mono and Monzo's brand system, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Steel Blue #4682b4
analogousshippedSteel Blue is #1815bc's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Sienna #a0522d
split-complementSienna is a split-complement of #1815bc: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Blue Violet #8a2be2
analogousshippedBlue Violet is #1815bc'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 #1815bc: softer than #000 and cool enough to feel like part of the same palette.
Slate Gray #708090
shippedSlate Gray is paired with #1815bc in two real palettes: Ink & Paper and Campus, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #1815bc: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #1815bc
Tints & shades
Harmonies
Contrast
| #1815bc as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 11.22:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.87:1 | 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 #1815bc 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
#1815bc 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 #1815bc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/1815bc-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