Color #643BC9 Color / Colour Code #643BC9
This page shows the hex color code for color #643bc9 (#643BC9). The colour is a purple tone with 57% saturation and 51% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #643BC9 against common backgrounds.
Complementary Colors
#643BC9 paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 227, 257, and 287 degrees for harmonious combinations.
Triadic Palette
Three colors at 257, 17, and 137 degrees.
Color Palettes Using #643BC9
Five shades at lightness levels 15% through 85% while keeping hue at 257 and saturation at 57%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 257 to 302 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 257 with its complement at 77 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 #643BC9
Lightness variations at hue 257 and 57% saturation.
CSS Gradients with #643BC9
Design Use Cases for #643BC9
Balanced UI Color
At 57% saturation, #643BC9 strikes a balance between vibrancy and restraint. This makes it versatile for primary UI elements like navigation bars, card headers, and form accents. It draws attention without overwhelming adjacent content.
Soft Accent & Highlight
With 51% lightness, #643BC9 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.
Creativity & Premium Positioning
#643BC9 falls in the purple spectrum (hue 257). Purple communicates creativity, wisdom, and luxury. It is effective for premium product highlights, creative portfolio accents, meditation app interfaces, and rewards program branding. Purple occupies a unique space between the energy of red and the calm of blue.
Gradient Pairing
Create a gradient from #643BC9 (hue 257) to its complement at hue 77. For a subtler effect, try pairing with an analogous color at hue 287. Use CSS: background: linear-gradient(135deg, #643bc9, #a1c93b);
CSS Code for #643BC9
Similar Colors
Colors visually similar to #643BC9 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #643BC9 across image editing and color design tools.
About Color #643BC9 (#643BC9)
#643BC9 is a purple color (colour) with RGB channel values of 100 red, 59 green, and 201 blue. The blue channel is dominant by a ratio of 3.4:1 over the weakest channel. In HSL terms, the hue sits at 257 degrees with 57% saturation and 51% lightness, placing it in the cool range of the colour spectrum.
The perceived brightness of #643BC9 is 87/255 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 50% cyan, 71% magenta, 0% yellow, and 21% key (black).
The WCAG contrast ratio of #643BC9 against white is 6.97:1 and against black is 3.01:1. This meets the AA requirement (4.5:1) for normal text on white. For AAA compliance, consider darkening to at least 36% lightness.
The complementary colour #A1C93B creates maximum visual tension when paired with #643BC9. For more harmonious color combinations, use the analogous colours #3B5AC9 and #AA3BC9, 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 #643BC9
- 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 #643BC9?
- #643BC9 is Color #643BC9, a purple color (colour) with RGB(100, 59, 201), HSL(257, 57%, 51%), and CMYK(50%, 71%, 0%, 21%). Its perceived brightness is 87/255.
- Is #643BC9 accessible for text?
- Against white, #643BC9 has a contrast ratio of 6.97:1 (passes AA for normal text). Against black, it has 3.01:1 (fails AA). Use the contrast checker tool for custom background pairings.
- What colours pair well with #643BC9?
- The complementary colour is #A1C93B (hue 77). For subtle color combinations, use analogous colours #3B5AC9 and #AA3BC9. The triadic palette adds #C9633B and #3BC963 for vibrant variety.
- How do I use #643BC9 in CSS?
- Use any format: color: #643bc9; or rgb(100, 59, 201); or hsl(257, 57%, 51%). For CSS custom properties: --color-primary: 257 57% 51%; 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.