Color
#183f72
#183f72rgb(24, 63, 114)hsl(214, 65%, 27%)oklch(0.369 0.098 256.4)Colors that go with #183f72
Crimson, Teal 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.
Crimson #dc143c
triadicshippedCrimson completes a triad with #183f72 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Teal #008080
analogousshippedTeal is #183f72's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped5 real palettes, including Alaska Airlines's brand system and CVS's brand system put Blue beside #183f72, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #183f72: 4 real palettes, including Open House and Coastal, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #183f72: 14 real palettes, including Hasbro's brand system and Hinge's brand system, as the supporting colour.
Light Sea Green #20b2aa
shippedLight Sea Green shows up next to #183f72 in 4 real palettes, including Confluent's brand system and Lagoon, as the accent.
Orange Red #ff4500
shippedOrange Red is paired with #183f72 in 4 real palettes, including Tumblr's brand system and Tide's brand system, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #183f72: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #183f72
Tints & shades
Harmonies
Contrast
| #183f72 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.54:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.99:1 | 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 #183f72 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
#183f72 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 #183f72 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/183f72-9ca9c4-df5a4e-1f1f2d-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