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#0015D1 Color

#0015D1 is rgb(0, 21, 209) in RGB, hsl(234, 100%, 41%) in HSL, and about cmyk(100%, 90%, 0%, 18%) in CMYK. It has no registered color name of its own — the closest is Medium Blue (#0000CD), clearly related but distinguishable side by side at ΔE 5.09. White text is the more readable choice on this background.

#0015D1
HEX#0015D1
RGBrgb(0, 21, 209)
HSLhsl(234, 100%, 41%)
HSVhsv(234, 100%, 82%)
CMYKcmyk(100%, 90%, 0%, 18%)
OKLCHoklch(40% 0.262 264.2)
LABlab(24.96% 53.65 -93.51)
LCHlch(24.96% 107.81 299.85)

What #0015D1 Is Called

Most hex codes have no name: there are 16.7 million of them and a few thousand registered names. These are the named colors nearest to #0015D1, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Medium Blue#0000CDΔE 5.09Ultramarine Blue(caran D'ache)#2111EFΔE 13.91Palatinate Blue#273BE2ΔE 16.04Han Purple#5218FAΔE 17.13Neon Blue#1B03A3ΔE 17.98Iridescent Indigo#3C32CDΔE 18.6

Browse the full index of named colors A-Z or every blue in the library.

#0015D1 Channel Values

How #0015D1 breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

ModelChannelsNotes
RGBR 0 · G 21 · B 2098-bit channels as sent to the display
HSLH 234° · S 100% · L 41%Easiest model for building lighter and darker variants
HSVH 234° · S 100% · V 82%Matches the picker in most design tools
CMYKC 100% · M 90% · Y 0% · K 18%Approximate ink mix; confirm with an ICC profile before printing
Luminance10.36:1 vs white · 2.03:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #0015D1 background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.

TextWhite text10.36:1AA normal AA large AAA normal
Fails AABlack text2.03:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #0015D1 in the contrast checker.

Colors That Go With #0015D1

Pairings derived from color-wheel relationships. The complementary color sits opposite #0015D1; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#0015D1
Complementary
#D1BC00
Analogous
#007DD1
Analogous
#5400D1
Triadic
#D10015
Triadic
#15D100
Split comp.
#D15400
Split comp.
#7DD100

Tints & Shades of #0015D1

Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.

Tints

#0019FA
#243AFF
#4D5EFF
#7A88FF
#A3ACFF
#CCD1FF

Shades

#0012B8
#000F99
#000D80
#000A66
#00084D
#00052E

Want a full 50-950 ramp with semantic roles? Generate design tokens from #0015D1.

How #0015D1 Looks with Color Vision Deficiency

Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.

Typical#0015D1
Protanopia#1212D1
Protanomaly#0C13D1
Deuteranopia#1010D1
Deuteranomaly#0A12D1
Tritanopia#005353
Tritanomaly#004296
Achromatopsia#404040

Test a full palette in the color blindness simulator.

Using #0015D1 in Code

Copy-ready declarations for the places this color usually ends up.

CSS custom property--color-0015d1: #0015D1;
CSS backgroundbackground-color: #0015D1;
Tailwind configcolors: { 'color-0015d1': '#0015D1' }
SwiftUIColor(red: 0.000, green: 0.082, blue: 0.820)
Android XML<color name="color_0015d1">#0015D1</color>
SVG fillfill="#0015D1"

More Blue Colors

#0015D1 sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

000024fafaff00002ef9fafb000033f8fafc000038f8f8ff000042f5faff000047f5f5ff002147007dfa0f52ba1c39bb2a3439372aac4e3cc364609a7abdff979aaab8dbffd6d6ff

#0015D1 Frequently Asked Questions

What color is #0015D1?

#0015D1 is a mid-tone blue — rgb(0, 21, 209) in RGB and hsl(234, 100%, 41%) in HSL. It carries no registered color name of its own; the closest named color is Medium Blue (#0000CD), which is clearly related but distinguishable side by side at a CIE76 distance of 5.09.

What is the RGB value of #0015D1?

#0015D1 is rgb(0, 21, 209) — red 0, green 21, and blue 209 on the 0-255 scale.

What is the CMYK value of #0015D1?

#0015D1 converts to approximately cmyk(100%, 90%, 0%, 18%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #0015D1 be black or white?

White text is the more readable choice. #0015D1 scores 10.36:1 against white and 2.03:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #0015D1 as a CSS color keyword?

No. #0015D1 is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is mediumblue (#0000CD) at a CIE76 distance of 5.09, which is clearly related but distinguishable side by side.

Open #0015D1 in a Tool

Hex to RGBHex to HSLHex to CMYKHex to OKLCHHex to PantoneBuild a paletteMake a gradient

Keep exploring: every blue in the color library, the guide to shades of blue, or the full color library.