Color #397F66 Color / Colour Code #397F66
This page shows the hex color code for color #397f66 (#397F66). The colour is a cyan tone with 38% saturation and 36% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #397F66 against common backgrounds.
Complementary Colors
#397F66 paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 129, 159, and 189 degrees for harmonious combinations.
Triadic Palette
Three colors at 159, 279, and 39 degrees.
Color Palettes Using #397F66
Five shades at lightness levels 15% through 85% while keeping hue at 159 and saturation at 38%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 159 to 204 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 159 with its complement at 339 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 #397F66
Lightness variations at hue 159 and 38% saturation.
CSS Gradients with #397F66
Design Use Cases for #397F66
Balanced UI Color
At 38% saturation, #397F66 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 36% lightness, #397F66 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
#397F66 is in the cyan spectrum (hue 159). 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 #397F66 (hue 159) to its complement at hue 339. For a subtler effect, try pairing with an analogous color at hue 189. Use CSS: background: linear-gradient(135deg, #397f66, #7f3951);
CSS Code for #397F66
Similar Colors
Colors visually similar to #397F66 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #397F66 across image editing and color design tools.
About Color #397F66 (#397F66)
#397F66 is a cyan color (colour) with RGB channel values of 57 red, 127 green, and 102 blue. The green channel is dominant by a ratio of 2.2:1 over the weakest channel. In HSL terms, the hue sits at 159 degrees with 38% saturation and 36% lightness, placing it in the neutral-to-cool range of the colour spectrum.
The perceived brightness of #397F66 is 103/255 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 55% cyan, 0% magenta, 20% yellow, and 50% key (black).
The WCAG contrast ratio of #397F66 against white is 4.77:1 and against black is 4.40:1. This meets the AA requirement (4.5:1) for normal text on white. For AAA compliance, consider darkening to at least 25% lightness.
The complementary colour #7F3951 creates maximum visual tension when paired with #397F66. For more harmonious color combinations, use the analogous colours #397F43 and #39747F, 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 #397F66
- 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 #397F66?
- #397F66 is Color #397F66, a cyan color (colour) with RGB(57, 127, 102), HSL(159, 38%, 36%), and CMYK(55%, 0%, 20%, 50%). Its perceived brightness is 103/255.
- Is #397F66 accessible for text?
- Against white, #397F66 has a contrast ratio of 4.77:1 (passes AA for normal text). Against black, it has 4.40:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #397F66?
- The complementary colour is #7F3951 (hue 339). For subtle color combinations, use analogous colours #397F43 and #39747F. The triadic palette adds #66397F and #7F6639 for vibrant variety.
- How do I use #397F66 in CSS?
- Use any format: color: #397f66; or rgb(57, 127, 102); or hsl(159, 38%, 36%). For CSS custom properties: --color-primary: 159 38% 36%; 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.