Named color

Blinking Terminal

#66cc00

hex#66cc00

rgbrgb(102, 204, 0)

hslhsl(90, 100%, 40%)

oklchoklch(0.753 0.223 135.8)

Relative luminance 0.4601

Vivid

Open in palette tool Check contrast

Blinking Terminal 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 2 public brands that use it and the palettes it appears in.

Tints & shades

Tints — toward white

75eb00 85ff0a 91ff24 a1ff42 b0ff61 bfff80 cfff9e dbffb8 ebffd6 fafff5

Shades — toward black

5cb800 54a800 4a9400 428500 387000 2e5c00 264d00 1c3800 142900 0a1400

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

Harmonies

Complementary

Open in tool →

66cc00 6600cc

#6600cc

Analogous

Open in tool →

66cc00 cccc00 00cc00

#cccc00 · #00cc00

Triadic

Open in tool →

66cc00 0066cc cc0066

#0066cc · #cc0066

Split-complementary

Open in tool →

66cc00 0000cc cc00cc

#0000cc · #cc00cc

Tetradic

Open in tool →

66cc00 00cccc 6600cc cc0000

#00cccc · #6600cc · #cc0000

Contrast

Blinking Terminal as text	Ratio	AA	AA large	AAA	Fix
Aaon white	2.06:1	fail	fail	fail	AA: use #428500 as the text (4.58:1) AAA: use #306100 as the text (7.41:1) AA: or shift the background to #474747 (4.51:1) AAA: or shift the background to #292929 (7.07:1)
Aaon black	10.2:1	pass	pass	pass	Passes AAA — no fix needed.

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

Brands using this color

Palettes built around it

58cc02 1cb0f6 ff9600 ffffff 1c1c1c

Learning App

Open in tool →

Green, blue and orange at full saturation: the gamified-learning look, where every color is a reward.

Playful Vivid FriendlyEducation

mcpConnect your agent — build around Blinking Terminal

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 #66cc00 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/66cc00-adbea2-514edf-202d1f-f1f1e9?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