#66a5e5

Color #66a5e5

A vivid, highly saturated light blue.

Closest named color Steel Blue #4682b4 · ΔE 15.08 Nearest Tailwind class blue-400 #51a2ff · ΔE 2.7

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

Conversions

HEX

#66a5e5

RGB

rgb(102, 165, 229)

HSL

hsl(210.2, 70.9%, 64.9%)

HSV / HSB

hsv(210.2, 55.5%, 89.8%)

CMYK

cmyk(55.5%, 27.9%, 0%, 10.2%)

LAB

lab(66.05, -1.99, -38.4)

LCH

lch(66.05, 38.45, 267.03)

OKLCH

oklch(70.6%, 0.1148, 250.08)

HWB

hwb(210.2, 40%, 10.2%)

Harmony colors

Complementary

#e5a666

Analogous

#66e5e5

#66a5e5

#6666e5

Triadic

#66a5e5

#e566a5

#a5e566

Split-complementary

#66a5e5

#e56666

#e5e566

Tetradic

#66a5e5

#a666e5

#e5a666

#a5e566

Square

#66a5e5

#e566e5

#e5a666

#66e566

Shades

Color #66a5e5 mixed toward black.

#3789dd

#206ebd

#18528d

#10375e

#081b2f

Tints

Color #66a5e5 mixed toward white.

#80b4e9

#99c3ee

#b3d2f2

#cce1f6

#e6f0fb

Tones

Color #66a5e5 mixed toward gray.

#71a5da

#7ba5d0

#86a5c5

#90a5bb

#9ba5b0

Accessibility

Aa White text on this color

2.6:1

Aa Black text on this color

8.08:1

Black text reads better on this background (8.08:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#8687d8 · ΔE 14.9

Deuteranopia

#827dd4 · ΔE 17.3

Tritanopia

#6acdca · ΔE 24.2

Achromatopsia

#a0a0a0 · ΔE 20.6

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

Code

CSS

background-color: #66a5e5;

Tailwind (arbitrary value)

bg-[#66a5e5]

Related colors

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Alice Blue #f0f8ff

Steel Blue #4682b4

Light Steel Blue #b0c4de

Frequently asked questions

#66a5e5 (#66a5e5) is rgb(102, 165, 229) in RGB.

No, #66a5e5 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.

Try it → Accessibility

Contrast Checker

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

Try it → Generators

Palette Generator

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

Try it →

Build something with this color

Generate a full palette from #66a5e5, or check how it holds up for accessibility.

Generate a palette → Check contrast