Color
#3d4571
#3d4571rgb(61, 69, 113)hsl(231, 30%, 34%)oklch(0.404 0.075 274.8)Colors that go with #3d4571
Steel Blue, Blue and Copper 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 #3d4571's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped7 real palettes, including Alaska Airlines's brand system and CVS's brand system put Blue beside #3d4571, as the accent.
Copper #b87333
shippedDesigners have shipped Copper with #3d4571: 4 real palettes, including Dusk and Desert Road, as the accent.
Crimson #dc143c
shippedCrimson is paired with #3d4571 in 9 real palettes, including Codecademy's brand system and Walgreens's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #3d4571: 15 real palettes, including Hinge's brand system and Jack Daniel's's brand system, as the accent.
Goldenrod #daa520
shippedGoldenrod shows up next to #3d4571 in 4 real palettes, including Sapphire & Gold and Disney's brand system, as the supporting colour.
Midnight Blue #191970
shipped13 real palettes, including Microsoft's brand system and First Snow put Midnight Blue beside #3d4571, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #3d4571: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #3d4571
Tints & shades
Harmonies
Contrast
| #3d4571 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.18:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.29:1 | 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 #3d4571 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
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 #3d4571 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3d4571-9c9ec4-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