Color #331F8A Color / Colour Code #331F8A
This page shows the hex color code for color #331f8a (#331F8A). The colour is a blue tone with 63% saturation and 33% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #331F8A against common backgrounds.
Complementary Colors
#331F8A paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 221, 251, and 281 degrees for harmonious combinations.
Triadic Palette
Three colors at 251, 11, and 131 degrees.
Color Palettes Using #331F8A
Five shades at lightness levels 15% through 85% while keeping hue at 251 and saturation at 63%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 251 to 296 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 251 with its complement at 71 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 #331F8A
Lightness variations at hue 251 and 63% saturation.
CSS Gradients with #331F8A
Design Use Cases for #331F8A
Vibrant Brand Color
#331F8A has a strong 63% 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 33% lightness, #331F8A 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
#331F8A sits in the blue range (hue 251). 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 #331F8A (hue 251) to its complement at hue 71. For a subtler effect, try pairing with an analogous color at hue 281. Use CSS: background: linear-gradient(135deg, #331f8a, #76891f);
CSS Code for #331F8A
Similar Colors
Colors visually similar to #331F8A based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #331F8A across image editing and color design tools.
About Color #331F8A (#331F8A)
#331F8A is a blue color (colour) with RGB channel values of 51 red, 31 green, and 138 blue. The blue channel is dominant by a ratio of 4.5:1 over the weakest channel. In HSL terms, the hue sits at 251 degrees with 63% saturation and 33% lightness, placing it in the cool range of the colour spectrum.
The perceived brightness of #331F8A is 49/255 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 63% cyan, 78% magenta, 0% yellow, and 46% key (black).
The WCAG contrast ratio of #331F8A against white is 12.33:1 and against black is 1.70:1. 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 #76891F creates maximum visual tension when paired with #331F8A. For more harmonious color combinations, use the analogous colours #1F4189 and #681F89, 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 #331F8A
- 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 #331F8A?
- #331F8A is Color #331F8A, a blue color (colour) with RGB(51, 31, 138), HSL(251, 63%, 33%), and CMYK(63%, 78%, 0%, 46%). Its perceived brightness is 49/255.
- Is #331F8A accessible for text?
- Against white, #331F8A has a contrast ratio of 12.33:1 (passes AA for normal text). Against black, it has 1.70:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #331F8A?
- The complementary colour is #76891F (hue 71). For subtle color combinations, use analogous colours #1F4189 and #681F89. The triadic palette adds #89331F and #1F8933 for vibrant variety.
- How do I use #331F8A in CSS?
- Use any format: color: #331f8a; or rgb(51, 31, 138); or hsl(251, 63%, 33%). For CSS custom properties: --color-primary: 251 63% 33%; 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.