Color #129EA5 Color / Colour Code #129EA5
This page shows the hex color code for color #129ea5 (#129EA5). The colour is a cyan tone with 80% saturation and 36% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #129EA5 against common backgrounds.
Complementary Colors
#129EA5 paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 153, 183, and 213 degrees for harmonious combinations.
Triadic Palette
Three colors at 183, 303, and 63 degrees.
Color Palettes Using #129EA5
Five shades at lightness levels 15% through 85% while keeping hue at 183 and saturation at 80%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 183 to 228 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 183 with its complement at 3 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 #129EA5
Lightness variations at hue 183 and 80% saturation.
CSS Gradients with #129EA5
Design Use Cases for #129EA5
Vibrant Brand Color
#129EA5 has a strong 80% saturation that makes it ideal for brand identity elements. Use it for logos, primary call-to-action buttons, hero section accents, and marketing materials where visual impact matters. This saturation level is eye-catching without being harsh.
Primary Interface Color
At 36% lightness, #129EA5 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
#129EA5 is in the cyan spectrum (hue 183). 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 #129EA5 (hue 183) to its complement at hue 3. For a subtler effect, try pairing with an analogous color at hue 213. Use CSS: background: linear-gradient(135deg, #129ea5, #a51a12);
CSS Code for #129EA5
Similar Colors
Colors visually similar to #129EA5 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #129EA5 across image editing and color design tools.
About Color #129EA5 (#129EA5)
#129EA5 is a cyan color (colour) with RGB channel values of 18 red, 158 green, and 165 blue. The blue channel is dominant by a ratio of 9.2:1 over the weakest channel. In HSL terms, the hue sits at 183 degrees with 80% saturation and 36% lightness, placing it in the cool range of the colour spectrum.
The perceived brightness of #129EA5 is 117/255 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 89% cyan, 4% magenta, 0% yellow, and 35% key (black).
The WCAG contrast ratio of #129EA5 against white is 3.25:1 and against black is 6.46:1. This only passes AA for large text (18pt+) on white. For normal body text on white, darken the color or use it on a dark background where it achieves 6.46:1.
The complementary colour #A51A12 creates maximum visual tension when paired with #129EA5. For more harmonious color combinations, use the analogous colours #12A563 and #1254A5, 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 #129EA5
- 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 #129EA5?
- #129EA5 is Color #129EA5, a cyan color (colour) with RGB(18, 158, 165), HSL(183, 80%, 36%), and CMYK(89%, 4%, 0%, 35%). Its perceived brightness is 117/255.
- Is #129EA5 accessible for text?
- Against white, #129EA5 has a contrast ratio of 3.25:1 (fails AA for normal text). Against black, it has 6.46:1 (passes AA). It passes AA for large text (18pt+) on white. Use the contrast checker tool for custom background pairings.
- What colours pair well with #129EA5?
- The complementary colour is #A51A12 (hue 3). For subtle color combinations, use analogous colours #12A563 and #1254A5. The triadic palette adds #A5129E and #9EA512 for vibrant variety.
- How do I use #129EA5 in CSS?
- Use any format: color: #129ea5; or rgb(18, 158, 165); or hsl(183, 80%, 36%). For CSS custom properties: --color-primary: 183 80% 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.