Deep Slate Gray
A muted, cool dark blue.
#3B4D5F
rgb(59, 77, 95)
Color formats
HEX
#3B4D5F
RGB
rgb(59, 77, 95)
HSL
hsl(210, 23.4%, 30.2%)
HSV
hsv(210, 37.9%, 37.3%)
CMYK
cmyk(37.9%, 18.9%, 0%, 62.7%)
Color shades
Lighter tints and darker shades of Deep Slate Gray.
Lightest
#A1B3C5
Lighter
#62809E
Base
#3B4D5F
Darker
#141A20
Darkest
#000000
Complementary
The opposite hue on the color wheel.
Analogous
Neighbouring hues that harmonise.
Contrast & readability
Where Deep Slate Gray works
Deep Slate Gray (#3B4D5F) is a muted, cool dark blue. Its mid-range lightness makes it a flexible choice for buttons, fills and accents that need to read clearly without overpowering a layout. Its cool undertone lends a calm, trustworthy feel that suits clean, professional interfaces.
Observe the spectrum
More colors related to Deep Slate Gray — or browse all grays.
Color tools
Color Format Converter
Convert any color between HEX, RGB, HSL, HSV, CMYK and OKLCH instantly — and copy ready-to-paste CSS, SCSS or Tailwind.
Color Picker
Pick any color visually and copy accurate HEX, RGB, HSL and CMYK codes — no signup.
Palette Generator
Generate harmonious color palettes from any base color — complementary, analogous, triadic and more, with instant CSS export.
Contrast Checker
Test color contrast against WCAG 2.1 AA/AAA — live pass/fail, font-size rules, and a real component preview.
Shade & Tint Generator
Generate 10–12 step tints and shades from any color — perfect 50–950 UI ramps with CSS and Tailwind export.
Complementary Color Finder
Find the perfect complementary (180° opposite) color for any shade, with HEX/RGB/HSL and contrast info.