#2121d3

Color #2121d3

A vivid, highly saturated medium blue.

Closest named color Medium Blue #0000cd · ΔE 9.54 Nearest Tailwind class indigo-700 #432dd7 · ΔE 3.5

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Conversions

HEX

#2121d3

RGB

rgb(33, 33, 211)

HSL

hsl(240, 73%, 47.8%)

HSV / HSB

hsv(240, 84.4%, 82.7%)

CMYK

cmyk(84.4%, 84.4%, 0%, 17.3%)

LAB

lab(29.69, 60.16, -87.09)

LCH

lch(29.69, 105.85, 304.64)

OKLCH

oklch(42%, 0.2522, 268.48)

HWB

hwb(240, 12.9%, 17.3%)

Harmony colors

Complementary

#d3d321

Analogous

#217ad3

#2121d3

#7a21d3

Triadic

#2121d3

#d32121

#21d321

Split-complementary

#2121d3

#d37a21

#7ad321

Tetradic

#2121d3

#d321d3

#d3d321

#21d321

Square

#2121d3

#d3217a

#d3d321

#21d37a

Shades

Color #2121d3 mixed toward black.

#1b1bb0

#16168d

#101069

#0b0b46

#050523

Tints

Color #2121d3 mixed toward white.

#3f3fe1

#6565e7

#8c8ced

#b2b2f3

#d9d9f9

Tones

Color #2121d3 mixed toward gray.

#3030c4

#3f3fb5

#4d4da6

#5c5c98

#6b6b89

Accessibility

Aa White text on this color

9.45:1

Aa Black text on this color

2.22:1

White text reads better on this background (9.45:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#2121bb · ΔE 3

Deuteranopia

#2121b5 · ΔE 3.8

Tritanopia

#21a5a0 · ΔE 49.2

Achromatopsia

#464646 · ΔE 31.3

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

Code

CSS

background-color: #2121d3;

Tailwind (arbitrary value)

bg-[#2121d3]

Related colors

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Medium Blue #0000cd

Frequently asked questions

#2121d3 (#2121d3) is rgb(33, 33, 211) in RGB.

No, #2121d3 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 #2121d3, or check how it holds up for accessibility.

Generate a palette → Check contrast