Color #288F63 Color / Colour Code #288F63
This page shows the hex color code for color #288f63 (#288F63). The colour is a cyan tone with 56% saturation and 36% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #288F63 against common backgrounds.
Complementary Colors
#288F63 paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 124, 154, and 184 degrees for harmonious combinations.
Triadic Palette
Three colors at 154, 274, and 34 degrees.
Color Palettes Using #288F63
Five shades at lightness levels 15% through 85% while keeping hue at 154 and saturation at 56%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 154 to 199 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 154 with its complement at 334 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 #288F63
Lightness variations at hue 154 and 56% saturation.
CSS Gradients with #288F63
Design Use Cases for #288F63
Balanced UI Color
At 56% saturation, #288F63 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.
Primary Interface Color
At 36% lightness, #288F63 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.
Clarity & Technology
#288F63 is in the cyan spectrum (hue 154). Cyan evokes technology, clarity, and innovation. It works well for tech product interfaces, data visualization accents, loading indicators, and futuristic design themes. Cyan provides a modern alternative to traditional blues.
Gradient Pairing
Create a gradient from #288F63 (hue 154) to its complement at hue 334. For a subtler effect, try pairing with an analogous color at hue 184. Use CSS: background: linear-gradient(135deg, #288f63, #8f2855);
CSS Code for #288F63
Similar Colors
Colors visually similar to #288F63 based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #288F63 across image editing and color design tools.
About Color #288F63 (#288F63)
#288F63 is a cyan color (colour) with RGB channel values of 40 red, 143 green, and 99 blue. The green channel is dominant by a ratio of 3.6:1 over the weakest channel. In HSL terms, the hue sits at 154 degrees with 56% saturation and 36% lightness, placing it in the neutral-to-cool range of the colour spectrum.
The perceived brightness of #288F63 is 107/255 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 72% cyan, 0% magenta, 31% yellow, and 44% key (black).
The WCAG contrast ratio of #288F63 against white is 4.04:1 and against black is 5.20:1. This only passes AA for large text (18pt+) on white. For normal body text on white, darken the color or use it on a dark background where it achieves 5.20:1.
The complementary colour #8F2855 creates maximum visual tension when paired with #288F63. For more harmonious color combinations, use the analogous colours #288F2F and #28888F, 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 #288F63
- 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 #288F63?
- #288F63 is Color #288F63, a cyan color (colour) with RGB(40, 143, 99), HSL(154, 56%, 36%), and CMYK(72%, 0%, 31%, 44%). Its perceived brightness is 107/255.
- Is #288F63 accessible for text?
- Against white, #288F63 has a contrast ratio of 4.04:1 (fails AA for normal text). Against black, it has 5.20:1 (passes AA). It passes AA for large text (18pt+) on white. Use the contrast checker tool for custom background pairings.
- What colours pair well with #288F63?
- The complementary colour is #8F2855 (hue 334). For subtle color combinations, use analogous colours #288F2F and #28888F. The triadic palette adds #63288F and #8F6328 for vibrant variety.
- How do I use #288F63 in CSS?
- Use any format: color: #288f63; or rgb(40, 143, 99); or hsl(154, 56%, 36%). For CSS custom properties: --color-primary: 154 56% 36%; 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.