Color #21CEFC Color / Colour Code #21CEFC
This page shows the hex color code for color #21cefc (#21CEFC). The colour is a cyan tone with 97% saturation and 56% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #21CEFC against common backgrounds.
Complementary Colors
#21CEFC paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 163, 193, and 223 degrees for harmonious combinations.
Triadic Palette
Three colors at 193, 313, and 73 degrees.
Color Palettes Using #21CEFC
Five shades at lightness levels 15% through 85% while keeping hue at 193 and saturation at 97%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 193 to 238 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 193 with its complement at 13 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 #21CEFC
Lightness variations at hue 193 and 97% saturation.
CSS Gradients with #21CEFC
Design Use Cases for #21CEFC
High-Impact Accent
With 97% saturation, #21CEFC is highly vivid. Reserve this for elements that need maximum attention: primary action buttons, notification badges, error states, or promotional banners. Use sparingly alongside neutral tones to avoid visual fatigue.
Soft Accent & Highlight
With 56% lightness, #21CEFC 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.
Clarity & Technology
#21CEFC is in the cyan spectrum (hue 193). 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 #21CEFC (hue 193) to its complement at hue 13. For a subtler effect, try pairing with an analogous color at hue 223. Use CSS: background: linear-gradient(135deg, #21cefc, #fc5122);
CSS Code for #21CEFC
Similar Colors
Colors visually similar to #21CEFC based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #21CEFC across image editing and color design tools.
About Color #21CEFC (#21CEFC)
#21CEFC is a cyan color (colour) with RGB channel values of 33 red, 206 green, and 252 blue. The blue channel is dominant by a ratio of 7.6:1 over the weakest channel. In HSL terms, the hue sits at 193 degrees with 97% saturation and 56% lightness, placing it in the cool range of the colour spectrum.
The perceived brightness of #21CEFC is 160/255 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 87% cyan, 18% magenta, 0% yellow, and 1% key (black).
The WCAG contrast ratio of #21CEFC against white is 1.86:1 and against black is 11.30:1. This does not meet AA requirements on white. Use it on dark backgrounds where it achieves 11.30:1, or use it exclusively for decorative purposes.
The complementary colour #FC5122 creates maximum visual tension when paired with #21CEFC. For more harmonious color combinations, use the analogous colours #22FCBE and #2260FC, 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 #21CEFC
- 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 #21CEFC?
- #21CEFC is Color #21CEFC, a cyan color (colour) with RGB(33, 206, 252), HSL(193, 97%, 56%), and CMYK(87%, 18%, 0%, 1%). Its perceived brightness is 160/255.
- Is #21CEFC accessible for text?
- Against white, #21CEFC has a contrast ratio of 1.86:1 (fails AA for normal text). Against black, it has 11.30:1 (passes AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #21CEFC?
- The complementary colour is #FC5122 (hue 13). For subtle color combinations, use analogous colours #22FCBE and #2260FC. The triadic palette adds #FC22CC and #CCFC22 for vibrant variety.
- How do I use #21CEFC in CSS?
- Use any format: color: #21cefc; or rgb(33, 206, 252); or hsl(193, 97%, 56%). For CSS custom properties: --color-primary: 193 97% 56%; 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.