Gemstone
Open in tool →Emerald, amethyst and ruby on velvet-black — the jewel-tone trio; the surface must be dark or the stones go plastic.
Color
#120519
#120519
hex
#120519rgb
rgb(18, 5, 25)hsl
hsl(279, 67%, 6%)oklch
oklch(0.151 0.047 313)Closest name: Crow (#180614)Relative luminance 0.0031
Colors that go with #120519
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 #120519: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
complementaryshippedSea Green sits directly opposite #120519 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Sienna #a0522d
triadicshippedSienna completes a triad with #120519 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Slate Blue #6a5acd
analogousshippedSlate Blue is #120519's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
split-complementshippedTeal is a split-complement of #120519: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with #120519 in 16 real palettes, including Southwest Airlines's brand system and Lemon Squeezy's brand system, as the accent.
Blue #0000ff
shipped18 real palettes, including Pfizer's brand system and native Cybersecurity's brand system put Blue beside #120519, as the supporting colour.
Blue Violet #8a2be2
shippedBlue Violet is paired with #120519 in 10 real palettes, including Gemstone and Twitch's brand system, as the supporting colour.
Real palettes that use #120519
Tints & shades
Harmonies
Contrast
| #120519 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 19.78:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.06:1 | 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 #120519 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
Fonts for this mood
#120519 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #120519
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 #120519 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/120519-b99fc1-b9cb62-2d1f2c-ebe9f1?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