Color
#1b5155
#1b5155rgb(27, 81, 85)hsl(184, 52%, 22%)oklch(0.402 0.056 202.1)Colors that go with #1b5155
Crimson, Steel Blue and 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.
Crimson #dc143c
complementaryshippedCrimson sits directly opposite #1b5155 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 #1b5155's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped8 real palettes, including Jeep's brand system and Alaska Airlines's brand system put Blue beside #1b5155, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #1b5155: 5 real palettes, including Paper & Pine and Open House, as the supporting colour.
Copper #b87333
shippedDesigners have shipped Copper with #1b5155: 4 real palettes, including Desert Road and Notion's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #1b5155: 11 real palettes, including Hinge's brand system and Jack Daniel's's brand system, as the accent.
Emerald Green #50c878
shippedEmerald Green is paired with #1b5155 in 6 real palettes, including Neon's brand system and Chime's brand system, as the lead colour.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #1b5155: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #1b5155
Tints & shades
Harmonies
Contrast
| #1b5155 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.92:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.35:1 | 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 #1b5155 as the background.
Brands using this color
Fonts for this mood
#1b5155 reads as cool, dark, luxury. 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 #1b5155 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/1b5155-a2b9be-df4e8a-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