Color #40BF64 Color / Colour Code #40BF64
This page shows the hex color code for color #40bf64 (#40BF64). The colour is a green tone with 50% saturation and 50% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #40BF64 against common backgrounds.
Complementary Colors
#40BF64 paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 107, 137, and 167 degrees for harmonious combinations.
Triadic Palette
Three colors at 137, 257, and 17 degrees.
Color Palettes Using #40BF64
Five shades at lightness levels 15% through 85% while keeping hue at 137 and saturation at 50%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 137 to 182 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 137 with its complement at 317 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 #40BF64
Lightness variations at hue 137 and 50% saturation.
CSS Gradients with #40BF64
Design Use Cases for #40BF64
Balanced UI Color
At 50% saturation, #40BF64 strikes a balance between vibrancy and restraint. This makes it versatile for primary UI elements like navigation bars, card headers, and form accents. It draws attention without overwhelming adjacent content.
Soft Accent & Highlight
With 50% lightness, #40BF64 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
#40BF64 falls in the green range (hue 137). 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 #40BF64 (hue 137) to its complement at hue 317. For a subtler effect, try pairing with an analogous color at hue 167. Use CSS: background: linear-gradient(135deg, #40bf64, #bf409b);
CSS Code for #40BF64
Similar Colors
Colors visually similar to #40BF64 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #40BF64 across image editing and color design tools.
About Color #40BF64 (#40BF64)
#40BF64 is a green color (colour) with RGB channel values of 64 red, 191 green, and 100 blue. The green channel is dominant by a ratio of 3.0:1 over the weakest channel. In HSL terms, the hue sits at 137 degrees with 50% saturation and 50% lightness, placing it in the neutral-to-cool range of the colour spectrum.
The perceived brightness of #40BF64 is 143/255 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 66% cyan, 0% magenta, 48% yellow, and 25% key (black).
The WCAG contrast ratio of #40BF64 against white is 2.37:1 and against black is 8.85:1. This does not meet AA requirements on white. Use it on dark backgrounds where it achieves 8.85:1, or use it exclusively for decorative purposes.
The complementary colour #BF409B creates maximum visual tension when paired with #40BF64. For more harmonious color combinations, use the analogous colours #5BBF40 and #40BFA4, 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 #40BF64
- 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 #40BF64?
- #40BF64 is Color #40BF64, a green color (colour) with RGB(64, 191, 100), HSL(137, 50%, 50%), and CMYK(66%, 0%, 48%, 25%). Its perceived brightness is 143/255.
- Is #40BF64 accessible for text?
- Against white, #40BF64 has a contrast ratio of 2.37:1 (fails AA for normal text). Against black, it has 8.85:1 (passes AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #40BF64?
- The complementary colour is #BF409B (hue 317). For subtle color combinations, use analogous colours #5BBF40 and #40BFA4. The triadic palette adds #6440BF and #BF6440 for vibrant variety.
- How do I use #40BF64 in CSS?
- Use any format: color: #40bf64; or rgb(64, 191, 100); or hsl(137, 50%, 50%). For CSS custom properties: --color-primary: 137 50% 50%; 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.