Color #427D8B Color / Colour Code #427D8B
This page shows the hex color code for color #427d8b (#427D8B). The colour is a cyan tone with 36% saturation and 40% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #427D8B against common backgrounds.
Complementary Colors
#427D8B paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 162, 192, and 222 degrees for harmonious combinations.
Triadic Palette
Three colors at 192, 312, and 72 degrees.
Color Palettes Using #427D8B
Five shades at lightness levels 15% through 85% while keeping hue at 192 and saturation at 36%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 192 to 237 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 192 with its complement at 12 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 #427D8B
Lightness variations at hue 192 and 36% saturation.
CSS Gradients with #427D8B
Design Use Cases for #427D8B
Balanced UI Color
At 36% saturation, #427D8B 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 40% lightness, #427D8B 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
#427D8B is in the cyan spectrum (hue 192). 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 #427D8B (hue 192) to its complement at hue 12. For a subtler effect, try pairing with an analogous color at hue 222. Use CSS: background: linear-gradient(135deg, #427d8b, #8b5041);
CSS Code for #427D8B
Similar Colors
Colors visually similar to #427D8B based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #427D8B across image editing and color design tools.
About Color #427D8B (#427D8B)
#427D8B is a cyan color (colour) with RGB channel values of 66 red, 125 green, and 139 blue. The blue channel is dominant by a ratio of 2.1:1 over the weakest channel. In HSL terms, the hue sits at 192 degrees with 36% saturation and 40% lightness, placing it in the cool range of the colour spectrum.
The perceived brightness of #427D8B is 109/255 using the ITU-R BT.601 luma formula (0.299R + 0.587G + 0.114B). This appears dark to the human eye, so pair it with light text for adequate readability. For print production, the CMYK equivalent is 53% cyan, 10% magenta, 0% yellow, and 45% key (black).
The WCAG contrast ratio of #427D8B against white is 4.63:1 and against black is 4.54:1. This meets the AA requirement (4.5:1) for normal text on white. For AAA compliance, consider darkening to at least 28% lightness.
The complementary colour #8B5041 creates maximum visual tension when paired with #427D8B. For more harmonious color combinations, use the analogous colours #418B75 and #41578B, 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 #427D8B
- 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 #427D8B?
- #427D8B is Color #427D8B, a cyan color (colour) with RGB(66, 125, 139), HSL(192, 36%, 40%), and CMYK(53%, 10%, 0%, 45%). Its perceived brightness is 109/255.
- Is #427D8B accessible for text?
- Against white, #427D8B has a contrast ratio of 4.63:1 (passes AA for normal text). Against black, it has 4.54:1 (passes AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #427D8B?
- The complementary colour is #8B5041 (hue 12). For subtle color combinations, use analogous colours #418B75 and #41578B. The triadic palette adds #8B417C and #7C8B41 for vibrant variety.
- How do I use #427D8B in CSS?
- Use any format: color: #427d8b; or rgb(66, 125, 139); or hsl(192, 36%, 40%). For CSS custom properties: --color-primary: 192 36% 40%; 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.