Color
#243384
#243384rgb(36, 51, 132)hsl(231, 57%, 33%)oklch(0.362 0.137 270.1)Colors that go with #243384
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 #243384: softer than #000 and cool enough to feel like part of the same palette.
Steel Blue #4682b4
analogousshippedSteel Blue is #243384'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 #243384, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #243384 in 9 real palettes, including Casper Sleep's brand system and Marvel's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #243384: 12 real palettes, including Hasbro's brand system and Panasonic's brand system, as the supporting colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #243384: 4 real palettes, including Nintendo's brand system and 3M's brand system, as the accent.
Royal Blue #4169e1
shippedRoyal Blue is paired with #243384 in 11 real palettes, including Nokia's brand system and Discord's brand system, as the supporting colour.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #243384 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Real palettes that use #243384
Tints & shades
Harmonies
Contrast
| #243384 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 11.16:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.88:1 | 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 #243384 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
#243384 reads as cool, modern. 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 #243384 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/243384-9c9ec4-df834e-231f2d-e9eef1?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