#1666ab

Color #1666ab

A vivid, highly saturated dark blue.

Closest named color Steel Blue #4682b4 · ΔE 16.74 Nearest Tailwind class sky-700 #0069a8 · ΔE 2.3

Open in Palette generator Color wheel Color mixer Contrast checker Blindness simulator Gradient

Conversions

HEX

#1666ab

RGB

rgb(22, 102, 171)

HSL

hsl(207.8, 77.2%, 37.8%)

HSV / HSB

hsv(207.8, 87.1%, 67.1%)

CMYK

cmyk(87.1%, 40.4%, 0%, 32.9%)

LAB

lab(42.17, 3.05, -43.3)

LCH

lch(42.17, 43.41, 274.03)

OKLCH

oklch(50.1%, 0.1316, 250.24)

HWB

hwb(207.8, 8.6%, 32.9%)

Harmony colors

Complementary

#ab5b16

Analogous

#16aba5

#1666ab

#161bab

Triadic

#1666ab

#ab1666

#66ab16

Split-complementary

#1666ab

#ab161b

#aba516

Tetradic

#1666ab

#5b16ab

#ab5b16

#66ab16

Square

#1666ab

#a516ab

#ab5b16

#1bab16

Shades

Color #1666ab mixed toward black.

#12558e

#0f4472

#0b3355

#072239

#04111c

Tints

Color #1666ab mixed toward white.

#1c82da

#449be7

#72b4ed

#a1cdf3

#d0e6f9

Tones

Color #1666ab mixed toward gray.

#22659e

#2f6492

#3b6386

#486279

#54616d

Accessibility

Aa White text on this color

5.96:1

Aa Black text on this color

3.52:1

White text reads better on this background (5.96:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#46479e · ΔE 15

Deuteranopia

#423c9a · ΔE 17.8

Tritanopia

#209290 · ΔE 28.3

Achromatopsia

#646464 · ΔE 22

Left half is the original, right half is the simulated appearance. See all 8 vision types →

Code

CSS

background-color: #1666ab;

Tailwind (arbitrary value)

bg-[#1666ab]

Related colors

Alice Blue #f0f8ff

Steel Blue #4682b4

Dodger Blue #1e90ff

Light Slate Gray #778899

Slate Gray #708090

Charcoal #36454f

Frequently asked questions

#1666ab (#1666ab) is rgb(22, 102, 171) in RGB.

No, #1666ab is not one of the 216 web-safe colors — for that, every RGB channel would have to be a multiple of 51.

Related tools

Colors

HEX to RGB Converter

Convert any HEX color code to its RGB and HSL equivalents, live, with copy-to-clipboard values.

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Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

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Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

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Build something with this color

Generate a full palette from #1666ab, or check how it holds up for accessibility.

Generate a palette → Check contrast