Color

#283a80

#283a80
hex#283a80
rgbrgb(40, 58, 128)
hslhsl(228, 52%, 33%)
oklchoklch(0.376 0.12 269.1)
Closest name: Deep Space Royal (#223382)Relative luminance 0.0504

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#806e28

#286680 · #432880

#80283a · #3a8028

Split-complementary

Open in tool →

#804328 · #668028

#802866 · #806e28 · #288043

Contrast

#283a80 as textRatioAAAA largeAAAFix
Aaon white
10.46:1passpasspassPasses AAA — no fix needed.
Aaon black
2.01:1failfailfail
  • AA: use #586fca as the text (4.54:1)
  • AAA: use #8394d8 as the text (7.19:1)
  • AA: or shift the background to #ababab (4.56:1)
  • AAA: or shift the background to #d4d4d4 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #283a80 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#283a80 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #283a80
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #283a80 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/283a80-9c9fc4-df7c4e-231f2d-e9eff1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md