Color #66EA81 Color / Colour Code #66EA81
This page shows the hex color code for color #66ea81 (#66EA81). The colour is a green tone with 76% saturation and 66% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #66EA81 against common backgrounds.
Complementary Colors
#66EA81 paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 102, 132, and 162 degrees for harmonious combinations.
Triadic Palette
Three colors at 132, 252, and 12 degrees.
Color Palettes Using #66EA81
Five shades at lightness levels 15% through 85% while keeping hue at 132 and saturation at 76%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 132 to 177 degrees create a warm, unified palette. This analogous scheme works for marketing materials, seasonal campaigns, and any design that needs visual warmth without clashing colors.
Combines the base color at hue 132 with its complement at 312 and two adjacent cool tones. This split-complementary approach provides strong visual contrast while remaining more balanced than a pure complementary scheme.
Five evenly spaced hues at 40% saturation and 80% lightness. Pastels are gentle on the eyes and work well for dashboards, onboarding screens, category tags, and any interface where multiple distinct colors are needed without visual aggression.
Shades & Tints of #66EA81
Lightness variations at hue 132 and 76% saturation.
CSS Gradients with #66EA81
Design Use Cases for #66EA81
Vibrant Brand Color
#66EA81 has a strong 76% saturation that makes it ideal for brand identity elements. Use it for logos, primary call-to-action buttons, hero section accents, and marketing materials where visual impact matters. This saturation level is eye-catching without being harsh.
Soft Accent & Highlight
With 66% lightness, #66EA81 has a softer, more approachable quality. It works well for hover states, subtle highlights, progress indicators, and secondary UI elements. This lightness range is particularly effective for tag backgrounds and status indicators.
Success & Growth Indicators
#66EA81 falls in the green range (hue 132). Green universally represents success, growth, and safety. Use it for confirmation messages, positive chart data, eco-friendly badges, and health metrics. In financial dashboards, green indicates gains and positive performance.
Gradient Pairing
Create a gradient from #66EA81 (hue 132) to its complement at hue 312. For a subtler effect, try pairing with an analogous color at hue 162. Use CSS: background: linear-gradient(135deg, #66ea81, #ea66d0);
CSS Code for #66EA81
Similar Colors
Colors visually similar to #66EA81 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #66EA81 across image editing and color design tools.
About Color #66EA81 (#66EA81)
#66EA81 is a green color (colour) with RGB channel values of 102 red, 234 green, and 129 blue. The green channel is dominant by a ratio of 2.3:1 over the weakest channel. In HSL terms, the hue sits at 132 degrees with 76% saturation and 66% lightness, placing it in the neutral-to-cool range of the colour spectrum.
The perceived brightness of #66EA81 is 183/255 using the ITU-R BT.601 luma formula (0.299R + 0.587G + 0.114B). This is a medium-brightness color that can work with either dark or light text depending on font weight and size. For print production, the CMYK equivalent is 56% cyan, 0% magenta, 45% yellow, and 8% key (black).
The WCAG contrast ratio of #66EA81 against white is 1.54:1 and against black is 13.65:1. This does not meet AA requirements on white. Use it on dark backgrounds where it achieves 13.65:1, or use it exclusively for decorative purposes.
The complementary colour #EA66D0 creates maximum visual tension when paired with #66EA81. For more harmonious color combinations, use the analogous colours #8EEA66 and #66EAC3, which sit 30 degrees on either side of the hue wheel. To build a complete design system, start with the monochromatic scale above for consistent shade variations, then add one complementary or triadic accent for interactive elements.
How to Explore Color #66EA81
- Enter your color value in HEX format.
- The tool converts it to RGB, HSL, CMYK format in real time.
- Copy the converted value to your clipboard.
What is HEX to RGB, HSL, CMYK color conversion
Converting from HEX to RGB, HSL, CMYK translates a color value between two different color models. Different color models are used in web design (HEX, RGB), print (CMYK), and color theory (HSL, HSV).
Related Tools & Colors
Frequently Asked Questions
- What color / colour is #66EA81?
- #66EA81 is Color #66EA81, a green color (colour) with RGB(102, 234, 129), HSL(132, 76%, 66%), and CMYK(56%, 0%, 45%, 8%). Its perceived brightness is 183/255.
- Is #66EA81 accessible for text?
- Against white, #66EA81 has a contrast ratio of 1.54:1 (fails AA for normal text). Against black, it has 13.65:1 (passes AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #66EA81?
- The complementary colour is #EA66D0 (hue 312). For subtle color combinations, use analogous colours #8EEA66 and #66EAC3. The triadic palette adds #8166EA and #EA8166 for vibrant variety.
- How do I use #66EA81 in CSS?
- Use any format: color: #66ea81; or rgb(102, 234, 129); or hsl(132, 76%, 66%). For CSS custom properties: --color-primary: 132 76% 66%; then use it as hsl(var(--color-primary)).
- Is this color / colour explorer free?
- Yes, completely free with no signup required. All colour calculations run in your browser. You can explore any valid hex color code, not just the pre-generated palette.