01
Hue
Hue identifies the general color family using an angle around a color wheel. Values are commonly expressed in degrees from 0 to 360.
HSL → OKLCH Converter
Enter an hsl() value or drag the H, S and L sliders and get the OKLCH equivalent — with HEX, RGB, sRGB gamut info, contrast ratios and a live preview.
Input HSL
Accepts hsl(H S% L%), hsla() with commas, or bare H S L channels. S and L may be percent or 0–1.
Manual HSL sliders
Note: HSL hues are not perceptually uniform, so equal H shifts do not look equally spaced once converted to OKLCH.
Harmonies
Live preview
Acme UI
Preview surface
Text on white, muted text, and a button using your color as its background.
Subtle background derived from your color.
Channel values
Contrast checks (WCAG 2, 4.5:1)
✓ Copied!
COLOR SPACE CONVERTER
HSL to OKLCH Converter
Convert HSL colors to OKLCH values online with a clear, modern and developer-friendly color conversion workflow. Understand lightness, chroma and hue while working with modern CSS color formats.
HSL → OKLCH
Modern CSS
Free Online Tool
Browser Based
OVERVIEW
What Is an HSL to OKLCH Converter?
An HSL to OKLCH Converter changes a color expressed using the HSL color model into the OKLCH color space. HSL represents colors using hue, saturation and lightness, while OKLCH represents a color using perceptual lightness, chroma and hue.
This conversion is especially useful for modern web design, design systems, UI development, color palette creation and CSS development. OKLCH is designed around the OKLab color model and provides a cylindrical representation that makes lightness, chroma and hue easier to reason about.
HSL
Hue · Saturation · Lightness
OKLCH
Lightness · Chroma · Hue
UNDERSTANDING THE FORMATS
HSL and OKLCH Explained
HSL and OKLCH both describe colors with three main components, but they are based on different models and are useful for different design and development workflows.
02
Saturation
HSL saturation describes how strongly a color differs from its neutral gray counterpart. It is normally represented as a percentage.
03
Lightness
HSL lightness controls the position between black, the selected color and white. OKLCH uses a different lightness concept based on the OKLab color model.
COLOR MODEL
HSL vs OKLCH
| Property | HSL | OKLCH |
|---|---|---|
| Based on | HSL color model | OKLab color model |
| Components | Hue, Saturation, Lightness | Lightness, Chroma, Hue |
| Hue | Angle | Angle |
| Lightness | HSL lightness | Perceptual-style lightness |
| Chroma | Not a native component | Native component |
| CSS support | Widely supported | Modern CSS color syntax |
| Palette work | Simple traditional workflows | Modern color-system workflows |
OKLCH BASICS
What Do L, C and H Mean in OKLCH?
OKLCH uses three primary components. Understanding each component makes it much easier to create balanced colors and modify palettes intentionally.
L
Lightness
L represents perceived lightness in the OKLab-based color model. In CSS OKLCH syntax, lightness is commonly written as a percentage or an equivalent numeric value.
L 0% → 100%
C
Chroma
C represents chroma, which describes the strength or colorfulness of a color relative to the neutral axis. Higher chroma generally means a more vivid color, although the available gamut depends on the color space and display.
C 0 → higher chroma
H
Hue
H represents hue as an angle around the color wheel. It helps identify the color family, such as red, yellow, green, cyan, blue or magenta.
H 0° → 360°
OK
WHY OKLCH?
Why Convert HSL Colors to OKLCH?
OKLCH is useful when you want more structured control over lightness, chroma and hue. Instead of treating saturation and lightness as the primary controls, OKLCH gives designers a color model where lightness and chroma are explicit components.
BENEFITS
Benefits of Using HSL to OKLCH Conversion
Better palette control
OKLCH makes it easier to adjust lightness and chroma independently when creating related color variations.
Modern CSS workflows
Modern CSS includes OKLCH color notation, making converted values useful for contemporary front-end development.
Clearer color relationships
Designers can reason about lightness, chroma and hue separately instead of relying only on HSL saturation.
Design system flexibility
OKLCH can be useful when building systematic color scales, interfaces, themes and component libraries.
Useful for gradients
OKLCH can be explored for modern gradient and interpolation workflows where perceptual behavior is important.
Developer friendly output
The resulting OKLCH values can be copied into CSS and used in supported modern browser environments.
CSS EXAMPLE
OKLCH
Using OKLCH in CSS
.brand-color {
color: oklch(65% 0.18 250);
}
.button {
background: oklch(62% 0.20 260);
}
.button:hover {
background: oklch(68% 0.18 260);
}
CSS OKLCH values use the
oklch() function. Depending on the design and browser
support requirements, you can combine modern OKLCH declarations with
appropriate fallbacks.
CONVERSION LOGIC
How HSL to OKLCH Conversion Works
HSL to OKLCH conversion is more than simply rearranging three numbers. The two models use different mathematical representations, so a proper color conversion process is required.
01
Read the HSL color
The converter starts with the supplied hue, saturation and lightness values.
02
Interpret the HSL color
The HSL representation is resolved into a color representation suitable for conversion into the target color space.
03
Convert through a suitable color model
The color is transformed using the mathematical relationships required to reach the OKLab color model.
04
Transform OKLab to OKLCH
OKLab's Cartesian components are converted into cylindrical OKLCH coordinates: lightness, chroma and hue.
05
Return the final value
The converter presents the resulting OKLCH values in a format that can be copied into design tools or CSS code.
USE CASES
Who Can Use an HSL to OKLCH Converter?
HSL to OKLCH conversion can be useful for anyone working with digital colors, especially designers and developers building modern interfaces.
Web Designers
Create structured interface palettes.
UI/UX Designers
Explore consistent lightness and chroma variations.
Frontend Developers
Convert existing HSL colors into modern CSS values.
Design System Teams
Build scalable color tokens and theme systems.
Brand Designers
Explore digital color relationships and variations.
Students
Learn how different color models represent colors.
COLOR SYSTEM
HSL → OKLab → OKLCH
DESIGN WORKFLOW
HSL to OKLCH for Color Palette Creation
One of the most useful applications of HSL to OKLCH conversion is modern color palette development. Existing HSL colors can be converted and then explored using OKLCH lightness, chroma and hue.
Base Color
Start with an existing HSL brand or interface color and convert it into OKLCH.
Light Variations
Adjust the lightness component to explore lighter interface backgrounds and subtle variants.
Dark Variations
Reduce lightness to create darker states, borders, headings and interface accents.
Chroma Variations
Experiment with chroma to create softer or stronger versions of a color while maintaining the same general hue.
HSL
What Is HSL?
HSL stands for Hue, Saturation and Lightness. It is a widely used color model in web design and CSS because its three components are intuitive for many everyday color-selection tasks.
HSL is especially useful for traditional color manipulation, theming, quick palette adjustments and CSS code where broad browser compatibility is important.
OKLCH
What Is OKLCH?
OKLCH is a cylindrical representation of the OKLab color model. Its components are lightness, chroma and hue.
The format has become increasingly useful in modern web design because CSS supports OKLCH notation and designers can work with explicit lightness and chroma dimensions.
TECHNICAL REFERENCES
Learn More About Modern CSS Colors
For technical information about CSS color functions and modern color spaces, consult authoritative documentation from MDN and the W3C.
FAQ
Frequently Asked Questions
Common questions about converting HSL colors to OKLCH and using modern color formats.
What is an HSL to OKLCH Converter?
An HSL to OKLCH Converter changes a color represented with Hue, Saturation and Lightness into the OKLCH color space, which uses Lightness, Chroma and Hue.
What does HSL stand for?
HSL stands for Hue, Saturation and Lightness. It is a commonly used color model in CSS and digital design.
What does OKLCH stand for?
OKLCH refers to a cylindrical representation of the OKLab color model using lightness, chroma and hue.
What do L, C and H mean in OKLCH?
L represents lightness, C represents chroma and H represents hue. Hue is normally expressed as an angle, while lightness and chroma use numeric values appropriate to the OKLCH syntax.
Is OKLCH better than HSL?
Neither format is universally better. HSL remains convenient and widely supported, while OKLCH can provide a useful structure for modern palette design, lightness control and CSS color workflows.
Can I use OKLCH in CSS?
Yes. Modern CSS provides the oklch() color function. Browser support should still be considered when your project needs to support older environments.
Why convert HSL to OKLCH?
Conversion is useful when an existing HSL palette needs to be explored in a color model with explicit lightness and chroma components.
Is HSL to OKLCH conversion just changing the numbers?
No. HSL and OKLCH use different mathematical color models. A proper conversion requires color-space transformations rather than simply renaming or rearranging HSL components.
Can I use HSL to OKLCH conversion for web design?
Yes. It can be useful for UI colors, design systems, themes, gradients, buttons, backgrounds, borders and other digital design workflows.
What is chroma in OKLCH?
Chroma describes the colorfulness of a color relative to the neutral axis. Increasing chroma generally produces a stronger color, subject to gamut limitations.
What is the difference between OKLab and OKLCH?
OKLab represents colors using Cartesian components, while OKLCH is a cylindrical representation of OKLab using lightness, chroma and hue.
Can HSL and OKLCH represent the same colors?
They can describe the same underlying colors when appropriate color-space conversions are performed, but their component values are not directly interchangeable.
MODERN COLOR WORKFLOW
Convert HSL Colors Into Modern OKLCH Values
Use HSL when it fits your existing workflow, and explore OKLCH when you need modern CSS color syntax, explicit lightness and chroma controls, or a more structured approach to digital color systems.