Color #181BF2 Color / Colour Code #181BF2
This page shows the hex color code for color #181bf2 (#181BF2). The colour is a blue tone with 89% saturation and 52% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #181BF2 against common backgrounds.
Complementary Colors
#181BF2 paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 209, 239, and 269 degrees for harmonious combinations.
Triadic Palette
Three colors at 239, 359, and 119 degrees.
Color Palettes Using #181BF2
Five shades at lightness levels 15% through 85% while keeping hue at 239 and saturation at 89%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 239 to 284 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 239 with its complement at 59 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 #181BF2
Lightness variations at hue 239 and 89% saturation.
CSS Gradients with #181BF2
Design Use Cases for #181BF2
High-Impact Accent
With 89% saturation, #181BF2 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 52% lightness, #181BF2 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.
Trust & Professional Identity
#181BF2 sits in the blue range (hue 239). Blue is the world's most popular color for corporate identities because it conveys trust, stability, and competence. Use it for navigation bars, link text, form focus states, and any element where user confidence matters. Financial, healthcare, and technology brands rely heavily on this hue range.
Gradient Pairing
Create a gradient from #181BF2 (hue 239) to its complement at hue 59. For a subtler effect, try pairing with an analogous color at hue 269. Use CSS: background: linear-gradient(135deg, #181bf2, #f2ee18);
CSS Code for #181BF2
Similar Colors
Colors visually similar to #181BF2 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #181BF2 across image editing and color design tools.
About Color #181BF2 (#181BF2)
#181BF2 is a blue color (colour) with RGB channel values of 24 red, 27 green, and 242 blue. The blue channel is dominant by a ratio of 10.1:1 over the weakest channel. In HSL terms, the hue sits at 239 degrees with 89% saturation and 52% lightness, placing it in the cool range of the colour spectrum.
The perceived brightness of #181BF2 is 51/255 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 90% cyan, 89% magenta, 0% yellow, and 5% key (black).
The WCAG contrast ratio of #181BF2 against white is 8.48:1 and against black is 2.48:1. This exceeds the AAA requirement (7:1) for normal text on white, making it excellent for body text and small UI labels on light backgrounds.
The complementary colour #F2EE18 creates maximum visual tension when paired with #181BF2. For more harmonious color combinations, use the analogous colours #1888F2 and #8118F2, 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 #181BF2
- 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 #181BF2?
- #181BF2 is Color #181BF2, a blue color (colour) with RGB(24, 27, 242), HSL(239, 89%, 52%), and CMYK(90%, 89%, 0%, 5%). Its perceived brightness is 51/255.
- Is #181BF2 accessible for text?
- Against white, #181BF2 has a contrast ratio of 8.48:1 (passes AA for normal text). Against black, it has 2.48:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #181BF2?
- The complementary colour is #F2EE18 (hue 59). For subtle color combinations, use analogous colours #1888F2 and #8118F2. The triadic palette adds #F2181B and #1BF218 for vibrant variety.
- How do I use #181BF2 in CSS?
- Use any format: color: #181bf2; or rgb(24, 27, 242); or hsl(239, 89%, 52%). For CSS custom properties: --color-primary: 239 89% 52%; 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.