Color
#3a3d64
#3a3d64rgb(58, 61, 100)hsl(236, 27%, 31%)oklch(0.376 0.067 279.3)Colors that go with #3a3d64
Steel Blue, 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.
Steel Blue #4682b4
analogousshippedSteel Blue is #3a3d64's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
triadicshippedTeal completes a triad with #3a3d64 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Blue #0000ff
shipped7 real palettes, including Alaska Airlines's brand system and Dunkin''s brand system put Blue beside #3a3d64, as the accent.
Blush Pink #e8b4b8
shipped4 real palettes, including Nursery and Garden Wedding put Blush Pink beside #3a3d64, as the lead colour.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #3a3d64: 5 real palettes, including Open House and Coastal, as the supporting colour.
Copper #b87333
shippedDesigners have shipped Copper with #3a3d64: 5 real palettes, including Notion's brand system and Clean Beauty.
Crimson #dc143c
shippedCrimson is paired with #3a3d64 in 7 real palettes, including Marvel's brand system and Codecademy's brand system, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #3a3d64: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #3a3d64
Tints & shades
Harmonies
Contrast
| #3a3d64 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 10.34:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.03:1 | 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 #3a3d64 as the background.
Brands using this color
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 #3a3d64 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3a3d64-9e9cc4-df8f4e-241f2d-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