Color #181DBF Color / Colour Code #181DBF
This page shows the hex color code for color #181dbf (#181DBF). The colour is a blue tone with 78% saturation and 42% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #181DBF against common backgrounds.
Complementary Colors
#181DBF paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 208, 238, and 268 degrees for harmonious combinations.
Triadic Palette
Three colors at 238, 358, and 118 degrees.
Color Palettes Using #181DBF
Five shades at lightness levels 15% through 85% while keeping hue at 238 and saturation at 78%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 238 to 283 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 238 with its complement at 58 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 #181DBF
Lightness variations at hue 238 and 78% saturation.
CSS Gradients with #181DBF
Design Use Cases for #181DBF
Vibrant Brand Color
#181DBF has a strong 78% 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 42% lightness, #181DBF 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.
Trust & Professional Identity
#181DBF sits in the blue range (hue 238). 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 #181DBF (hue 238) to its complement at hue 58. For a subtler effect, try pairing with an analogous color at hue 268. Use CSS: background: linear-gradient(135deg, #181dbf, #bfb918);
CSS Code for #181DBF
Similar Colors
Colors visually similar to #181DBF based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #181DBF across image editing and color design tools.
About Color #181DBF (#181DBF)
#181DBF is a blue color (colour) with RGB channel values of 24 red, 29 green, and 191 blue. The blue channel is dominant by a ratio of 8.0:1 over the weakest channel. In HSL terms, the hue sits at 238 degrees with 78% saturation and 42% lightness, placing it in the cool range of the colour spectrum.
The perceived brightness of #181DBF is 46/255 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 87% cyan, 85% magenta, 0% yellow, and 25% key (black).
The WCAG contrast ratio of #181DBF against white is 10.68:1 and against black is 1.97:1. 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 #BFB918 creates maximum visual tension when paired with #181DBF. For more harmonious color combinations, use the analogous colours #1871BF and #6618BF, 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 #181DBF
- 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 #181DBF?
- #181DBF is Color #181DBF, a blue color (colour) with RGB(24, 29, 191), HSL(238, 78%, 42%), and CMYK(87%, 85%, 0%, 25%). Its perceived brightness is 46/255.
- Is #181DBF accessible for text?
- Against white, #181DBF has a contrast ratio of 10.68:1 (passes AA for normal text). Against black, it has 1.97:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #181DBF?
- The complementary colour is #BFB918 (hue 58). For subtle color combinations, use analogous colours #1871BF and #6618BF. The triadic palette adds #BF181D and #1DBF18 for vibrant variety.
- How do I use #181DBF in CSS?
- Use any format: color: #181dbf; or rgb(24, 29, 191); or hsl(238, 78%, 42%). For CSS custom properties: --color-primary: 238 78% 42%; 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.