Color
#183386
#183386rgb(24, 51, 134)hsl(225, 70%, 31%)oklch(0.358 0.143 265.6)Colors that go with #183386
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 #183386: softer than #000 and cool enough to feel like part of the same palette.
Steel Blue #4682b4
analogousshippedSteel Blue is #183386'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 Procter & Gamble's brand system and Alaska Airlines's brand system put Blue beside #183386, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #183386 in 9 real palettes, including Casper Sleep's brand system and Nintendo's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #183386: 12 real palettes, including Hasbro's brand system and Panasonic's brand system, as the supporting colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #183386 in 11 real palettes, including Nokia's brand system and Discord's brand system, as the supporting colour.
Tomato #ff6347
shipped5 real palettes, including dbt Labs's brand system and Harley-Davidson's brand system put Tomato beside #183386, as the lead colour.
Olive Green #808000
complementaryOlive Green sits directly opposite #183386 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Real palettes that use #183386
Tints & shades
Harmonies
Contrast
| #183386 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 11.31:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.86:1 | 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 #183386 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
#183386 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 #183386 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/183386-9ca1c4-df754e-221f2d-e9eff1?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