Color
#1b5d64
#1b5d64rgb(27, 93, 100)hsl(186, 57%, 25%)oklch(0.441 0.065 205.3)Colors that go with #1b5d64
Crimson, Blue and Cadet 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 #1b5d64 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped6 real palettes, including Rolex's brand system and Jeep's brand system put Blue beside #1b5d64, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #1b5d64: 4 real palettes, including Paper & Pine and Alpine, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #1b5d64: 11 real palettes, including HP's brand system and Hinge's brand system, as the accent.
Goldenrod #daa520
shippedGoldenrod shows up next to #1b5d64 in 5 real palettes, including Fireside and Mid-Century, as the accent.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #1b5d64 in 4 real palettes, including Mint Modern and Console Light, as the lead colour.
Midnight Blue #191970
shipped7 real palettes, including Lufthansa's brand system and Open House put Midnight Blue beside #1b5d64, as the lead colour.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #1b5d64: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #1b5d64
Tints & shades
Harmonies
Contrast
| #1b5d64 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.51:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.8:1 | 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 #1b5d64 as the background.
Brands using this color
Fonts for this mood
#1b5d64 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 #1b5d64 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/1b5d64-a2b8be-df4e86-1f262d-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