Color #031B2B Color / Colour Code #031B2B
This page shows the hex color code for color #031b2b (#031B2B). The colour is a blue tone with 87% saturation and 9% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #031B2B against common backgrounds.
Complementary Colors
#031B2B paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 174, 204, and 234 degrees for harmonious combinations.
Triadic Palette
Three colors at 204, 324, and 84 degrees.
Color Palettes Using #031B2B
Five shades at lightness levels 15% through 85% while keeping hue at 204 and saturation at 87%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 204 to 249 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 204 with its complement at 24 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 #031B2B
Lightness variations at hue 204 and 87% saturation.
CSS Gradients with #031B2B
Design Use Cases for #031B2B
High-Impact Accent
With 87% saturation, #031B2B 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.
Dark Mode Background
At just 9% lightness, #031B2B 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
#031B2B sits in the blue range (hue 204). 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 #031B2B (hue 204) to its complement at hue 24. For a subtler effect, try pairing with an analogous color at hue 234. Use CSS: background: linear-gradient(135deg, #031b2b, #2b1303);
CSS Code for #031B2B
Similar Colors
Colors visually similar to #031B2B based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #031B2B across image editing and color design tools.
About Color #031B2B (#031B2B)
#031B2B is a blue color (colour) with RGB channel values of 3 red, 27 green, and 43 blue. The blue channel is dominant by a ratio of 14.3:1 over the weakest channel. In HSL terms, the hue sits at 204 degrees with 87% saturation and 9% lightness, placing it in the cool range of the colour spectrum.
The perceived brightness of #031B2B is 22/255 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 93% cyan, 37% magenta, 0% yellow, and 83% key (black).
The WCAG contrast ratio of #031B2B against white is 17.57:1 and against black is 1.20:1. 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 #2B1303 creates maximum visual tension when paired with #031B2B. For more harmonious color combinations, use the analogous colours #032B27 and #03072B, 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 #031B2B
- 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 #031B2B?
- #031B2B is Color #031B2B, a blue color (colour) with RGB(3, 27, 43), HSL(204, 87%, 9%), and CMYK(93%, 37%, 0%, 83%). Its perceived brightness is 22/255.
- Is #031B2B accessible for text?
- Against white, #031B2B has a contrast ratio of 17.57:1 (passes AA for normal text). Against black, it has 1.20:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #031B2B?
- The complementary colour is #2B1303 (hue 24). For subtle color combinations, use analogous colours #032B27 and #03072B. The triadic palette adds #2B031B and #1B2B03 for vibrant variety.
- How do I use #031B2B in CSS?
- Use any format: color: #031b2b; or rgb(3, 27, 43); or hsl(204, 87%, 9%). For CSS custom properties: --color-primary: 204 87% 9%; 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.