Color
#03212a
#03212argb(3, 33, 42)hsl(194, 87%, 9%)oklch(0.231 0.039 221.5)Colors that go with #03212a
Charcoal, Crimson and Denim 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 #03212a: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
split-complementshippedCrimson is a split-complement of #03212a: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Denim #1560bd
analogousshippedDenim is #03212a's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Rust #b7410e
complementaryshippedRust sits directly opposite #03212a on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Sienna #a0522d
split-complementshippedSienna is a split-complement of #03212a: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Teal #008080
analogousshippedTeal is #03212a's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Amber #ffbf00
shippedAmber is paired with #03212a in 18 real palettes, including Blueprint and Google's brand system, as the accent.
Blue #0000ff
shipped23 real palettes, including Monzo's brand system and Signal's brand system put Blue beside #03212a, as the accent.
Real palettes that use #03212a
Tints & shades
Harmonies
Contrast
| #03212a as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 16.74:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.25:1 | 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 #03212a 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
#03212a reads as cool, vivid, dark. 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 #03212a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/03212a-9cb6c4-df4e72-1f242d-e9f1ef?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