Color
#243a70
#243a70rgb(36, 58, 112)hsl(223, 51%, 29%)oklch(0.361 0.097 265.2)Colors that go with #243a70
Steel Blue, Blue and Crimson 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.
Steel Blue #4682b4
analogousshippedSteel Blue is #243a70's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped9 real palettes, including Alaska Airlines's brand system and CVS's brand system put Blue beside #243a70, as the accent.
Crimson #dc143c
shippedCrimson is paired with #243a70 in 9 real palettes, including Marvel's brand system and Casper Sleep's brand system, as the accent.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #243a70: 4 real palettes, including Lamborghini's brand system and Kraken's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #243a70: 18 real palettes, including Hasbro's brand system and Panasonic's brand system, as the supporting colour.
Light Sea Green #20b2aa
shippedLight Sea Green shows up next to #243a70 in 4 real palettes, including Confluent's brand system and Lido, as the accent.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #243a70 in 4 real palettes, including Fintech Trust and Mint Modern, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #243a70: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #243a70
Tints & shades
Harmonies
Contrast
| #243a70 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.97:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.91:1 | 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 #243a70 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
#243a70 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 #243a70 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/243a70-9ca3c4-df704e-211f2d-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