#1B51A5

Color Details

HEX
#1B51A5
RGB
rgb(27, 81, 165)
HSL
hsl(217, 72%, 38%)
CMYK
cmyk(84%, 51%, 0%, 35%)
Best text on this color #FFFFFF (CR 7.59:1) Determined by WCAG contrast ratio

Readability Previews

Black on #1b51a5
Contrast 2.77:1 Fail
White on #1b51a5
Contrast 7.59:1 AAA
#1b51a5 on Black
Contrast 2.77:1 Fail
#1b51a5 on White
Contrast 7.59:1 AAA

Tints & Shades

#4974b7
#7697c9
#a4b9db
#164184
#103163
#0b2042

Complement & Analogous

#a7711b
#2b1ba7
#1b96a7

Triadic

#a71b51
#51a71b

Monochrome

#0b2042 #103163 #1b51a5 #7697c9 #a4b9db #d1dced

Analogous

#1b96a7 #5fb6c1 #1b51a5 #5549b9 #2b1ba7 #221686

Complementary Mix

#103163 #1b51a5 #7697c9 #a7711b #c6a36b #6d4912

Nearby Colors

#1b51a4
#1b51a6
#1b5195
#1b51b5

Embed #1B51A5 swatch

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About #1B51A5

#1B51A5 converts to RGB(27, 81, 165) and HSL(217, 72%, 38%). This page provides quick readability checks, related hues (complementary and analogous), and ready-made palettes so you can drop the color into UI components, images, or CSS immediately.

Tip: Use the “Best text” chip above as a safe default foreground on this color (chosen by contrast ratio).

#1B51A5 FAQs

What is the RGB value of #1B51A5?
RGB: 27, 81, 165. Copy as CSS: rgb(27, 81, 165)
Is #1B51A5 a web-safe color?
No — not in the 216-color “web-safe” palette.
What is the complementary color of #1B51A5?
Complement: #a7711b.
Does #1B51A5 have good contrast on white or black?
On white: 7.59:1 (AAA (normal text)). On black: 2.77:1 (Fails AA).