Alpine
Open in tool →Glacier blue with a safety-orange accent: technical outdoor gear, not lifestyle.
Color
#0a2129
#0a2129
hex
#0a2129rgb
rgb(10, 33, 41)hsl
hsl(195, 61%, 10%)oklch
oklch(0.233 0.032 223.7)Closest name: Sunken Ship (#10252a)Relative luminance 0.0131
Colors that go with #0a2129
Charcoal, Crimson and Sienna 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 #0a2129: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
split-complementshippedCrimson is a split-complement of #0a2129: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Sienna #a0522d
complementaryshippedSienna sits directly opposite #0a2129 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Steel Blue #4682b4
analogousshippedSteel Blue is #0a2129's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
analogousshippedTeal is #0a2129'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 #0a2129 in 18 real palettes, including Google's brand system and Wikipedia's brand system, as the accent.
Blue #0000ff
shipped23 real palettes, including Bumble's brand system and Signal's brand system put Blue beside #0a2129, as the supporting colour.
Blue Violet #8a2be2
shippedBlue Violet is paired with #0a2129 in 10 real palettes, including ClickUp's brand system and Yahoo's brand system, as the lead colour.
Real palettes that use #0a2129
Tints & shades
Harmonies
Contrast
| #0a2129 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 16.63:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.26:1 | 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 #0a2129 as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#0a2129 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #0a2129
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #0a2129 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/0a2129-9cb5c4-df4e70-1f242d-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