Color #40B09F Color / Colour Code #40B09F
This page shows the hex color code for color #40b09f (#40B09F). The colour is a cyan tone with 47% saturation and 47% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #40B09F against common backgrounds.
Complementary Colors
#40B09F paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 141, 171, and 201 degrees for harmonious combinations.
Triadic Palette
Three colors at 171, 291, and 51 degrees.
Color Palettes Using #40B09F
Five shades at lightness levels 15% through 85% while keeping hue at 171 and saturation at 47%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 171 to 216 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 171 with its complement at 351 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 #40B09F
Lightness variations at hue 171 and 47% saturation.
CSS Gradients with #40B09F
Design Use Cases for #40B09F
Balanced UI Color
At 47% saturation, #40B09F 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.
Primary Interface Color
At 47% lightness, #40B09F is in the mid-range, making it ideal for interactive elements like buttons, links, and selected states. This lightness level ensures good contrast against both light and dark adjacent elements in most layouts.
Clarity & Technology
#40B09F is in the cyan spectrum (hue 171). 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 #40B09F (hue 171) to its complement at hue 351. For a subtler effect, try pairing with an analogous color at hue 201. Use CSS: background: linear-gradient(135deg, #40b09f, #b04050);
CSS Code for #40B09F
Similar Colors
Colors visually similar to #40B09F based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #40B09F across image editing and color design tools.
About Color #40B09F (#40B09F)
#40B09F is a cyan color (colour) with RGB channel values of 64 red, 176 green, and 159 blue. The green channel is dominant by a ratio of 2.8:1 over the weakest channel. In HSL terms, the hue sits at 171 degrees with 47% saturation and 47% lightness, placing it in the neutral-to-cool range of the colour spectrum.
The perceived brightness of #40B09F is 141/255 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 64% cyan, 0% magenta, 10% yellow, and 31% key (black).
The WCAG contrast ratio of #40B09F against white is 2.65:1 and against black is 7.93:1. This does not meet AA requirements on white. Use it on dark backgrounds where it achieves 7.93:1, or use it exclusively for decorative purposes.
The complementary colour #B04050 creates maximum visual tension when paired with #40B09F. For more harmonious color combinations, use the analogous colours #40B067 and #4089B0, 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 #40B09F
- 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 #40B09F?
- #40B09F is Color #40B09F, a cyan color (colour) with RGB(64, 176, 159), HSL(171, 47%, 47%), and CMYK(64%, 0%, 10%, 31%). Its perceived brightness is 141/255.
- Is #40B09F accessible for text?
- Against white, #40B09F has a contrast ratio of 2.65:1 (fails AA for normal text). Against black, it has 7.93:1 (passes AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #40B09F?
- The complementary colour is #B04050 (hue 351). For subtle color combinations, use analogous colours #40B067 and #4089B0. The triadic palette adds #9F40B0 and #B09F40 for vibrant variety.
- How do I use #40B09F in CSS?
- Use any format: color: #40b09f; or rgb(64, 176, 159); or hsl(171, 47%, 47%). For CSS custom properties: --color-primary: 171 47% 47%; 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.