Bookshop
Open in tool →Chestnut and forest on cream read like a cloth-bound spine; the palette recedes so covers and type do the talking.
Color
#135e51
#135e51
hex
#135e51rgb
rgb(19, 94, 81)hsl
hsl(170, 66%, 22%)oklch
oklch(0.435 0.073 178)Closest name: Evergreen (#125b49)Relative luminance 0.0874
Colors that go with #135e51
Blue, Cadet Blue and Crimson 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.
Blue #0000ff
shipped4 real palettes, including Rolex's brand system and Warp's brand system put Blue beside #135e51, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #135e51: 4 real palettes, including Paper & Pine and Alpine, as the supporting colour.
Crimson #dc143c
split-complementshippedCrimson is a split-complement of #135e51: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Denim #1560bd
shippedDesigners have shipped Denim with #135e51: 6 real palettes, including HP's brand system and Hinge's brand system, as the accent.
Goldenrod #daa520
shippedGoldenrod shows up next to #135e51 in 5 real palettes, including Fireside and Mid-Century, as the accent.
Midnight Blue #191970
shipped5 real palettes, including Lufthansa's brand system and Open House put Midnight Blue beside #135e51, as the lead colour.
Orange Red #ff4500
shippedOrange Red is paired with #135e51 in 4 real palettes, including Neon's brand system and HubSpot's brand system, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #135e51: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #135e51
Tints & shades
Harmonies
Contrast
| #135e51 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.64:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.75:1 | 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 #135e51 as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#135e51 reads as vivid, dark, luxury. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #135e51
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 #135e51 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/135e51-a2bebd-d459a9-1f292d-e9f1ec?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