Color #99FF55 Color / Colour Code #99FF55
This page shows the hex color code for color #99ff55 (#99FF55). The colour is a green tone with 100% saturation and 67% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #99FF55 against common backgrounds.
Complementary Colors
#99FF55 paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 66, 96, and 126 degrees for harmonious combinations.
Triadic Palette
Three colors at 96, 216, and 336 degrees.
Color Palettes Using #99FF55
Five shades at lightness levels 15% through 85% while keeping hue at 96 and saturation at 100%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 96 to 141 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 96 with its complement at 276 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 #99FF55
Lightness variations at hue 96 and 100% saturation.
CSS Gradients with #99FF55
Design Use Cases for #99FF55
High-Impact Accent
With 100% saturation, #99FF55 is highly vivid. Reserve this for elements that need maximum attention: primary action buttons, notification badges, error states, or promotional banners. Use sparingly alongside neutral tones to avoid visual fatigue.
Soft Accent & Highlight
With 67% lightness, #99FF55 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
#99FF55 falls in the green range (hue 96). 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 #99FF55 (hue 96) to its complement at hue 276. For a subtler effect, try pairing with an analogous color at hue 126. Use CSS: background: linear-gradient(135deg, #99ff55, #bc57ff);
CSS Code for #99FF55
Similar Colors
Colors visually similar to #99FF55 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #99FF55 across image editing and color design tools.
About Color #99FF55 (#99FF55)
#99FF55 is a green color (colour) with RGB channel values of 153 red, 255 green, and 85 blue. The green channel is dominant by a ratio of 3.0:1 over the weakest channel. In HSL terms, the hue sits at 96 degrees with 100% saturation and 67% lightness, placing it in the neutral-to-cool range of the colour spectrum.
The perceived brightness of #99FF55 is 205/255 using the ITU-R BT.601 luma formula (0.299R + 0.587G + 0.114B). This means it appears bright to the human eye and is best paired with dark text for readability. For print production, the CMYK equivalent is 40% cyan, 0% magenta, 67% yellow, and 0% key (black).
The WCAG contrast ratio of #99FF55 against white is 1.25:1 and against black is 16.79:1. This does not meet AA requirements on white. Use it on dark backgrounds where it achieves 16.79:1, or use it exclusively for decorative purposes.
The complementary colour #BC57FF creates maximum visual tension when paired with #99FF55. For more harmonious color combinations, use the analogous colours #EEFF57 and #57FF68, 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 #99FF55
- 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 #99FF55?
- #99FF55 is Color #99FF55, a green color (colour) with RGB(153, 255, 85), HSL(96, 100%, 67%), and CMYK(40%, 0%, 67%, 0%). Its perceived brightness is 205/255.
- Is #99FF55 accessible for text?
- Against white, #99FF55 has a contrast ratio of 1.25:1 (fails AA for normal text). Against black, it has 16.79:1 (passes AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #99FF55?
- The complementary colour is #BC57FF (hue 276). For subtle color combinations, use analogous colours #EEFF57 and #57FF68. The triadic palette adds #579AFF and #FF579A for vibrant variety.
- How do I use #99FF55 in CSS?
- Use any format: color: #99ff55; or rgb(153, 255, 85); or hsl(96, 100%, 67%). For CSS custom properties: --color-primary: 96 100% 67%; 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.