Lido
Open in tool →Pool blue, watermelon and sun on white — the poolside summer set; the deep teal text keeps it from going juvenile.
Color
#1b313b
#1b313b
hex
#1b313brgb
rgb(27, 49, 59)hsl
hsl(199, 37%, 17%)oklch
oklch(0.299 0.033 228.7)Closest name: Elite Teal (#133337)Relative luminance 0.0275
Colors that go with #1b313b
Dark Olive Green, Sienna 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.
Dark Olive Green #556b2f
triadicshippedDark Olive Green completes a triad with #1b313b — 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 #1b313b 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 #1b313b'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 #1b313b'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 #1b313b in 11 real palettes, including Beach Hut and McDonald's's brand system, as the supporting colour.
Blue #0000ff
shipped18 real palettes, including Headspace's brand system and Minecraft's brand system put Blue beside #1b313b, as the accent.
Blush Pink #e8b4b8
shipped6 real palettes, including Rain Garden and Blush put Blush Pink beside #1b313b, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #1b313b: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #1b313b
Tints & shades
Harmonies
Contrast
| #1b313b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 13.56:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.55:1 | 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 #1b313b as the background.
Brands using this color
Palettes built around it
Still Water
Open in tool →Dusty teal and mist with a sand accent — low chroma, low contrast between colours, high contrast for text: the recipe for calm.
Dusty Blue
Open in tool →Dusty blue and mist with a nude accent — the quiet wedding palette; nothing here competes with a photograph.
Fonts for this mood
#1b313b reads as cool, dark, luxury. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #1b313b
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 #1b313b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/1b313b-9cb3c4-df4e66-1f232d-e9f1f0?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