Slate Blue Color
Slate Blue is a blue color with hex code #5B7C99. This page covers its meaning, all color values, harmonies, colors that go with slate blue, shades, tints, similar colors, CSS examples, FAQs, and WCAG contrast ratios.
Slate Blue Color Values
What Does Slate Blue Mean?
Slate Blue belongs to the blue family of colors. Blue wins popularity surveys in every culture that runs them, and corporate design reflects it. Trust and stability are the usual words people reach for. Dark navies project authority, pale blues open a layout up, and almost nothing clashes with it. Slate Blue sits at a mid-lightness, which keeps it readable on both white and black without much fuss.
In the ISCC-NBS color naming system, Slate Blue is classified as a blue (nearest centroid: moderate blue, #436B95).
Color Harmonies
Complementary
Analogous
Triadic
Colors That Go With Slate Blue
Slate Blue and #99785C are complements, parked opposite each other on the wheel. Together they hit maximum contrast, so a rough 70/30 split keeps the pairing from shouting.
Analogous neighbors — #5C9997 and #5C5E99, which sit beside slate blue on the wheel. Pairings like this feel calm and settled, which suits backgrounds and gradients.
For an energetic three-color palette, pair slate blue with triadic partners #995C7C and #7C995C. All three sit evenly spaced around the wheel, so the scheme stays lively without clashing.
Build and test these combinations in our Color Wheel Tool or check text readability with the Contrast Checker.
Tints and Shades
Tints (lighter)
Shades (darker)
Similar Colors
- Steel Blue —
#5A7D9A(Delta E 1) - Greyish Blue —
#5E819D(Delta E 2) - Stormy Blue —
#507B9C(Delta E 3) - Lynch —
#697E9A(Delta E 4) - Metallic Blue —
#4F738E(Delta E 4)
CSS Examples
.text { color: #5B7C99; }
.background { background-color: #5B7C99; }
.border { border: 2px solid #5B7C99; }
.shadow { box-shadow: 0 4px 6px #5B7C9940; }WCAG Contrast
Frequently Asked Questions
What is the hex code for slate blue?
Slate Blue has the hex code #5B7C99. In RGB notation it is rgb(91, 124, 153), in HSL it is hsl(208, 25%, 48%), and its OKLCH value is 0.573, 0.059, 245.6.
What does the color slate blue mean?
Blue-family colors like slate blue carry distinct psychological associations. Slate Blue belongs to the blue family of colors. Blue wins popularity surveys in every culture that runs them, and corporate design reflects it. Trust and stability are the usual words people reach for. Dark navies project authority, pale blues open a layout up, and almost nothing clashes with it. Slate Blue sits at a mid-lightness, which keeps it readable on both white and black without much fuss.
What colors go with slate blue?
Slate Blue has three easy routes: its complement #99785C for punch, its neighbors #5C9997 and #5C5E99 for something calmer, or triadic partners #995C7C and #7C995C when you want energy.
Is slate blue a standard web color?
No — Slate Blue is not a CSS keyword. Use its hex value #5B7C99 or any RGB/HSL equivalent in your stylesheets.
How do I make slate blue lighter or darker?
To lighten slate blue, add white to create tints; to darken it, add black to create shades. The tints and shades table above shows five computed steps of each, from #E2E8EE (lightest tint) to #0F151A (darkest shade).
About Slate Blue
Slate Blue is classified as a Blue in the ISCC-NBS color naming system, within the Blue hue family. It has The color is recognized by XKCD.
Use our Color Converter to convert #5B7C99 to any other color format, or explore the Color Wheel to find harmonious color combinations.