Color
#05666b
#05666brgb(5, 102, 107)hsl(183, 91%, 22%)oklch(0.465 0.078 200.8)Colors that go with #05666b
Charcoal, Crimson and Steel Blue 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 #05666b: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
complementaryshippedCrimson sits directly opposite #05666b 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 #05666b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped6 real palettes, including Rolex's brand system and Warp's brand system put Blue beside #05666b, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #05666b: 4 real palettes, including Alpine and Open House, as the supporting colour.
Copper #b87333
shippedDesigners have shipped Copper with #05666b: 4 real palettes, including Desert Road and Dusk, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #05666b: 14 real palettes, including The New York Times's brand system and HP's brand system, as the supporting colour.
Goldenrod #daa520
shippedGoldenrod shows up next to #05666b in 5 real palettes, including Mid-Century and Fireside, as the accent.
Real palettes that use #05666b
Tints & shades
Harmonies
Contrast
| #05666b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.73:1 | pass | pass | fail |
|
Aaon black | 3.12:1 | fail | pass | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #05666b as the background.
Brands using this color
Fonts for this mood
#05666b 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 #05666b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/05666b-a2b9be-d4598e-1f262d-e9f1ee?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