Color #40FB9F Color / Colour Code #40FB9F
This page shows the hex color code for color #40fb9f (#40FB9F). The colour is a cyan tone with 96% saturation and 62% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #40FB9F against common backgrounds.
Complementary Colors
#40FB9F paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 120, 150, and 180 degrees for harmonious combinations.
Triadic Palette
Three colors at 150, 270, and 30 degrees.
Color Palettes Using #40FB9F
Five shades at lightness levels 15% through 85% while keeping hue at 150 and saturation at 96%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 150 to 195 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 150 with its complement at 330 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 #40FB9F
Lightness variations at hue 150 and 96% saturation.
CSS Gradients with #40FB9F
Design Use Cases for #40FB9F
High-Impact Accent
With 96% saturation, #40FB9F 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 62% lightness, #40FB9F 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.
Clarity & Technology
#40FB9F is in the cyan spectrum (hue 150). Cyan evokes technology, clarity, and innovation. It works well for tech product interfaces, data visualization accents, loading indicators, and futuristic design themes. Cyan provides a modern alternative to traditional blues.
Gradient Pairing
Create a gradient from #40FB9F (hue 150) to its complement at hue 330. For a subtler effect, try pairing with an analogous color at hue 180. Use CSS: background: linear-gradient(135deg, #40fb9f, #fb419e);
CSS Code for #40FB9F
Similar Colors
Colors visually similar to #40FB9F based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #40FB9F across image editing and color design tools.
About Color #40FB9F (#40FB9F)
#40FB9F is a cyan color (colour) with RGB channel values of 64 red, 251 green, and 159 blue. The green channel is dominant by a ratio of 3.9:1 over the weakest channel. In HSL terms, the hue sits at 150 degrees with 96% saturation and 62% lightness, placing it in the neutral-to-cool range of the colour spectrum.
The perceived brightness of #40FB9F is 185/255 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 75% cyan, 0% magenta, 37% yellow, and 2% key (black).
The WCAG contrast ratio of #40FB9F against white is 1.35:1 and against black is 15.52:1. This does not meet AA requirements on white. Use it on dark backgrounds where it achieves 15.52:1, or use it exclusively for decorative purposes.
The complementary colour #FB419E creates maximum visual tension when paired with #40FB9F. For more harmonious color combinations, use the analogous colours #41FB41 and #41FBFB, 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 #40FB9F
- 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 #40FB9F?
- #40FB9F is Color #40FB9F, a cyan color (colour) with RGB(64, 251, 159), HSL(150, 96%, 62%), and CMYK(75%, 0%, 37%, 2%). Its perceived brightness is 185/255.
- Is #40FB9F accessible for text?
- Against white, #40FB9F has a contrast ratio of 1.35:1 (fails AA for normal text). Against black, it has 15.52:1 (passes AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #40FB9F?
- The complementary colour is #FB419E (hue 330). For subtle color combinations, use analogous colours #41FB41 and #41FBFB. The triadic palette adds #9E41FB and #FB9E41 for vibrant variety.
- How do I use #40FB9F in CSS?
- Use any format: color: #40fb9f; or rgb(64, 251, 159); or hsl(150, 96%, 62%). For CSS custom properties: --color-primary: 150 96% 62%; 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.