Terminal
Open in tool →Green for success, blue for links, pink for emphasis — the dark-mode developer family, tuned to sit on near-black without glare.
Color
#040f1b
#040f1b
hex
#040f1brgb
rgb(4, 15, 27)hsl
hsl(211, 74%, 6%)oklch
oklch(0.164 0.031 249.2)Closest name: Dark Rift (#060b14)Relative luminance 0.0045
Colors that go with #040f1b
Charcoal, Sea Green 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 #040f1b: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #040f1b — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sienna #a0522d
complementaryshippedSienna sits directly opposite #040f1b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Slate Blue #6a5acd
analogousshippedSlate Blue is #040f1b'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 #040f1b'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 #040f1b in 17 real palettes, including Southwest Airlines's brand system and Lemon Squeezy's brand system, as the accent.
Blue #0000ff
shipped20 real palettes, including Kia's brand system and MongoDB's brand system put Blue beside #040f1b, as the accent.
Blue Violet #8a2be2
shippedBlue Violet is paired with #040f1b in 10 real palettes, including Gemstone and Twitch's brand system, as the supporting colour.
Real palettes that use #040f1b
Tints & shades
Harmonies
Contrast
| #040f1b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 19.28:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.09:1 | 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 #040f1b as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#040f1b reads as cool, vivid, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #040f1b
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 #040f1b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/040f1b-9cabc4-df534e-1f202d-e9f1f1?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