Color #040F2E Color / Colour Code #040F2E
This page shows the hex color code for color #040f2e (#040F2E). The colour is a blue tone with 84% saturation and 10% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #040F2E against common backgrounds.
Complementary Colors
#040F2E paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 194, 224, and 254 degrees for harmonious combinations.
Triadic Palette
Three colors at 224, 344, and 104 degrees.
Color Palettes Using #040F2E
Five shades at lightness levels 15% through 85% while keeping hue at 224 and saturation at 84%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 224 to 269 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 224 with its complement at 44 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 #040F2E
Lightness variations at hue 224 and 84% saturation.
CSS Gradients with #040F2E
Design Use Cases for #040F2E
Vibrant Brand Color
#040F2E has a strong 84% 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.
Dark Mode Background
At just 10% lightness, #040F2E works as a dark mode background or overlay color. Dark backgrounds reduce eye strain in low-light environments and make bright accent colors pop. Pair with light text (minimum 4.5:1 contrast ratio) for readability.
Trust & Professional Identity
#040F2E sits in the blue range (hue 224). 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 #040F2E (hue 224) to its complement at hue 44. For a subtler effect, try pairing with an analogous color at hue 254. Use CSS: background: linear-gradient(135deg, #040f2e, #2f2304);
CSS Code for #040F2E
Similar Colors
Colors visually similar to #040F2E based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #040F2E across image editing and color design tools.
About Color #040F2E (#040F2E)
#040F2E is a blue color (colour) with RGB channel values of 4 red, 15 green, and 46 blue. The blue channel is dominant by a ratio of 11.5:1 over the weakest channel. In HSL terms, the hue sits at 224 degrees with 84% saturation and 10% lightness, placing it in the cool range of the colour spectrum.
The perceived brightness of #040F2E is 15/255 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 91% cyan, 67% magenta, 0% yellow, and 82% key (black).
The WCAG contrast ratio of #040F2E against white is 18.87:1 and against black is 1.11:1. 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 #2F2304 creates maximum visual tension when paired with #040F2E. For more harmonious color combinations, use the analogous colours #04252F and #0E042F, 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 #040F2E
- 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 #040F2E?
- #040F2E is Color #040F2E, a blue color (colour) with RGB(4, 15, 46), HSL(224, 84%, 10%), and CMYK(91%, 67%, 0%, 82%). Its perceived brightness is 15/255.
- Is #040F2E accessible for text?
- Against white, #040F2E has a contrast ratio of 18.87:1 (passes AA for normal text). Against black, it has 1.11:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #040F2E?
- The complementary colour is #2F2304 (hue 44). For subtle color combinations, use analogous colours #04252F and #0E042F. The triadic palette adds #2F0410 and #102F04 for vibrant variety.
- How do I use #040F2E in CSS?
- Use any format: color: #040f2e; or rgb(4, 15, 46); or hsl(224, 84%, 10%). For CSS custom properties: --color-primary: 224 84% 10%; 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.