Color
#212d69
#212d69rgb(33, 45, 105)hsl(230, 52%, 27%)oklch(0.324 0.106 270.9)Colors that go with #212d69
Charcoal, Steel Blue and Dark Olive Green 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 #212d69: softer than #000 and cool enough to feel like part of the same palette.
Steel Blue #4682b4
analogousshippedSteel Blue is #212d69's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Dark Olive Green #556b2f
complementaryshippedDark Olive Green sits directly opposite #212d69 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped10 real palettes, including Alaska Airlines's brand system and Sketch's brand system put Blue beside #212d69, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #212d69: 6 real palettes, including Open House and Coastal, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #212d69: 4 real palettes, including Purina Pro Plan's brand system and Blue Mono, as the accent.
Crimson #dc143c
shippedCrimson is paired with #212d69 in 11 real palettes, including Casper Sleep's brand system and Marvel's brand system, as the lead colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #212d69: 5 real palettes, including Kraken's brand system and Lamborghini's brand system, as the accent.
Real palettes that use #212d69
Tints & shades
Harmonies
Contrast
| #212d69 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 12.77:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.64:1 | 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 #212d69 as the background.
Brands using this color
Fonts for this mood
#212d69 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 #212d69 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/212d69-9c9ec4-df814e-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