Color #258EEF Color / Colour Code #258EEF
This page shows the hex color code for color #258eef (#258EEF). The colour is a blue tone with 86% saturation and 54% lightness. Explore its conversions, colour palettes, gradients, accessibility data, and CSS code below.
Color Conversions
Accessibility Contrast
WCAG contrast ratios for #258EEF against common backgrounds.
Complementary Colors
#258EEF paired with its color wheel opposite for maximum contrast.
Analogous Colors
Hues at 179, 209, and 239 degrees for harmonious combinations.
Triadic Palette
Three colors at 209, 329, and 89 degrees.
Color Palettes Using #258EEF
Five shades at lightness levels 15% through 85% while keeping hue at 209 and saturation at 86%. Use the darkest shade for text and the lightest for backgrounds to build a cohesive single-hue design system.
Adjacent hues from 209 to 254 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 209 with its complement at 29 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 #258EEF
Lightness variations at hue 209 and 86% saturation.
CSS Gradients with #258EEF
Design Use Cases for #258EEF
High-Impact Accent
With 86% saturation, #258EEF 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.
Soft Accent & Highlight
With 54% lightness, #258EEF 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.
Trust & Professional Identity
#258EEF sits in the blue range (hue 209). 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 #258EEF (hue 209) to its complement at hue 29. For a subtler effect, try pairing with an analogous color at hue 239. Use CSS: background: linear-gradient(135deg, #258eef, #ef8625);
CSS Code for #258EEF
Similar Colors
Colors visually similar to #258EEF based on RGB, lightness, and hue variations.
Use This Color in Design Tools
Apply #258EEF across image editing and color design tools.
About Color #258EEF (#258EEF)
#258EEF is a blue color (colour) with RGB channel values of 37 red, 142 green, and 239 blue. The blue channel is dominant by a ratio of 6.5:1 over the weakest channel. In HSL terms, the hue sits at 209 degrees with 86% saturation and 54% lightness, placing it in the cool range of the colour spectrum.
The perceived brightness of #258EEF is 122/255 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 85% cyan, 41% magenta, 0% yellow, and 6% key (black).
The WCAG contrast ratio of #258EEF against white is 3.39:1 and against black is 6.19:1. 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 6.19:1.
The complementary colour #EF8625 creates maximum visual tension when paired with #258EEF. For more harmonious color combinations, use the analogous colours #25EFEB and #2528EF, 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 #258EEF
- 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 #258EEF?
- #258EEF is Color #258EEF, a blue color (colour) with RGB(37, 142, 239), HSL(209, 86%, 54%), and CMYK(85%, 41%, 0%, 6%). Its perceived brightness is 122/255.
- Is #258EEF accessible for text?
- Against white, #258EEF has a contrast ratio of 3.39:1 (fails AA for normal text). Against black, it has 6.19:1 (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 #258EEF?
- The complementary colour is #EF8625 (hue 29). For subtle color combinations, use analogous colours #25EFEB and #2528EF. The triadic palette adds #EF258D and #8DEF25 for vibrant variety.
- How do I use #258EEF in CSS?
- Use any format: color: #258eef; or rgb(37, 142, 239); or hsl(209, 86%, 54%). For CSS custom properties: --color-primary: 209 86% 54%; 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.