brandsweets

Named color

Burning Ultrablue

#150aec
hex#150aec
rgbrgb(21, 10, 236)
hslhsl(243, 92%, 48%)
oklchoklch(0.434 0.29 266)
Relative luminance 0.0643
CoolVividTechnicalModern
Open in palette toolCheck contrast

Burning Ultrablue on this page is the real value, not a screenshot: exact hex, RGB, HSL and OKLCH, ten tints and ten shades, classic harmonies, and WCAG contrast with fixes — plus the 11 public brands that use it and the palettes it appears in.

Tints & shades

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

Harmonies

Complementary

Open in tool →
150aece0eb0a

#e0eb0a

Analogous

Open in tool →
150aec0a6feb860aeb

#0a6feb · #860aeb

Triadic

Open in tool →
150aeceb150a0aeb15

#eb150a · #0aeb15

Split-complementary

Open in tool →
150aeceb860a6feb0a

#eb860a · #6feb0a

Tetradic

Open in tool →
150aeceb0a6fe0eb0a0aeb86

#eb0a6f · #e0eb0a · #0aeb86

Contrast

Burning Ultrablue as textRatioAAAA largeAAAFix
Aaon white
9.18:1passpasspassPasses AAA — no fix needed.
Aaon black
2.29:1failfailfail
  • AA: use #6a62f8 as the text (4.72:1)
  • AAA: use #8f89fa as the text (7.13:1)
  • AA: or shift the background to #b8b8b8 (4.63:1)
  • AAA: or shift the background to #e3e3e3 (7.16:1)

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

Brands using this color

Fonts for this mood

Burning Ultrablue reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

Technical fonts →Modern fonts →
mcpConnect your agent — build around Burning Ultrablue
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 #150aec and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/150aec-a39cc4-dfa04e-261f2d-e9edf1?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