Color
#243f6a
#243f6argb(36, 63, 106)hsl(217, 49%, 28%)oklch(0.369 0.081 259.3)Colors that go with #243f6a
Blue, Blush Pink and Cadet 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.
Blue #0000ff
shippedBlue is paired with #243f6a in 8 real palettes, including Alaska Airlines's brand system and CVS's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Blush Pink #e8b4b8
shippedBlush Pink is paired with #243f6a in 4 real palettes, including Garden Wedding and Nursery, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Cadet Blue #5f9ea0
shippedCadet Blue is paired with #243f6a in 5 real palettes, including Open House and Coastal, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Copper #b87333
shippedCopper is paired with #243f6a in 4 real palettes, including Notion's brand system and Clean Beauty — a combination designers have actually shipped, not a computed rotation.
Crimson #dc143c
shippedCrimson is paired with #243f6a in 6 real palettes, including Marvel's brand system and Frost & Ember, as the accent — a combination designers have actually shipped, not a computed rotation.
Deep Sky Blue #00bfff
shippedDeep Sky Blue is paired with #243f6a in 4 real palettes, including Lamborghini's brand system and Vimeo's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #243f6a: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Teal #008080
analogousshippedTeal is #243f6a's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Real palettes that use #243f6a
Tints & shades
Harmonies
Contrast
| #243f6a as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.53:1 | 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 #243f6a as the background.
Brands using this color
Fonts for this mood
#243f6a reads as cool, dark, luxury. 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 #243f6a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/243f6a-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