Blueprint
Open in tool →Cyan and indigo on navy is the developer-tool look; amber is the only warm note, so it always reads as 'attention'.
Color
#121721
#121721
hex
#121721rgb
rgb(18, 23, 33)hsl
hsl(220, 29%, 10%)oklch
oklch(0.204 0.022 263.9)Closest name: Eigengrau (#16161d)Relative luminance 0.0085
Tints & shades
Harmonies
Contrast
| #121721 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 17.95:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.17:1 | 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 #121721 as the background.
Brands using this color
Palettes built around it
Console Light
Open in tool →A sober docs palette: one blue for interactive, one green for success, zinc greys for everything else.
Graphite
Open in tool →A greyscale system with a single amber — the accent does all the work, so allow one per screen.
Indigo SaaS
Open in tool →The dependable indigo-and-emerald B2B pairing: indigo for primary actions, emerald reserved for success states.
Slate Workspace
Open in tool →Slate on slate with a single blue — the productivity-app look where the interface disappears behind the work.
Clinic
Open in tool →Teal reads clinical without the coldness of pure blue; the coral accent adds warmth for reassurance moments.
Estate
Open in tool →Bronze on charcoal signals premium listings; the silver accent handles secondary detail without adding color.
Cobalt Pop
Open in tool →One deep cobalt and one hot pink on white — a two-accent system for launches and campaign pages that need punch.
Fonts for this mood
#121721 reads as cool, muted, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #121721
live endpointPoint any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #121721 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/121721-9ca5c4-df694e-211f2d-e9f0f1?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