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#0F21EB Color

#0F21EB is rgb(15, 33, 235) in RGB, hsl(235, 88%, 49%) in HSL, and about cmyk(94%, 86%, 0%, 8%) in CMYK. It has no registered color name of its own — the closest is Ultramarine Blue(caran D'ache) (#2111EF), clearly related but distinguishable side by side at ΔE 7.26. White text is the more readable choice on this background.

#0F21EB
HEX#0F21EB
RGBrgb(15, 33, 235)
HSLhsl(235, 88%, 49%)
HSVhsv(235, 94%, 92%)
CMYKcmyk(94%, 86%, 0%, 8%)
OKLCHoklch(44.5% 0.281 265.3)
LABlab(29.99% 56.02 -100.03)
LCHlch(29.99% 114.65 299.25)

What #0F21EB 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 #0F21EB, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Ultramarine Blue(caran D'ache)#2111EFΔE 7.26Medium Blue#0000CDΔE 9.08Han Purple#5218FAΔE 10.91Indigo (Color Wheel)#4000FFΔE 15.81Ultramarine#3F00FFΔE 15.82Blue#0000FFΔE 17.16

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

#0F21EB Channel Values

How #0F21EB 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 15 · G 33 · B 2358-bit channels as sent to the display
HSLH 235° · S 88% · L 49%Easiest model for building lighter and darker variants
HSVH 235° · S 94% · V 92%Matches the picker in most design tools
CMYKC 94% · M 86% · Y 0% · K 8%Approximate ink mix; confirm with an ICC profile before printing
Luminance8.62:1 vs white · 2.44:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #0F21EB 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 text8.62:1AA normal AA large AAA normal
Fails AABlack text2.44:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #0F21EB in the contrast checker.

Colors That Go With #0F21EB

Pairings derived from color-wheel relationships. The complementary color sits opposite #0F21EB; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#0F21EB
Complementary
#EBD90F
Analogous
#0F8FEB
Analogous
#6B0FEB
Triadic
#EB0F21
Triadic
#21EB0F
Split comp.
#EB6B0F
Split comp.
#8FEB0F

Tints & Shades of #0F21EB

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

#2C3DF2
#4E5BF4
#6F7AF6
#9199F8
#B2B8FA
#D4D7FC

Shades

#0D1DCE
#0B18AD
#091490
#07106E
#050C51
#030730

Want a full 50-950 ramp with semantic roles? Generate design tokens from #0F21EB.

How #0F21EB 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#0F21EB
Protanopia#1F1FEB
Protanomaly#1920EB
Deuteranopia#1C1CEB
Deuteranomaly#181EEB
Tritanopia#006060
Tritanomaly#004EAA
Achromatopsia#4C4C4C

Test a full palette in the color blindness simulator.

Using #0F21EB in Code

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

CSS custom property--color-0f21eb: #0F21EB;
CSS backgroundbackground-color: #0F21EB;
Tailwind configcolors: { 'color-0f21eb': '#0F21EB' }
SwiftUIColor(red: 0.059, green: 0.129, blue: 0.922)
Android XML<color name="color_0f21eb">#0F21EB</color>
SVG fillfill="#0F21EB"

More Blue Colors

#0F21EB sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

000024fafaff00002ef9fafb000033f8fafc000038f8f8ff000042f5faff000047f5f5ff002147007dfa0f52ba1c39bb2a3439372aac4e3cc364609a7abdff979aaab8dbffd6d6ff

#0F21EB Frequently Asked Questions

What color is #0F21EB?

#0F21EB is a mid-tone blue — rgb(15, 33, 235) in RGB and hsl(235, 88%, 49%) in HSL. It carries no registered color name of its own; the closest named color is Ultramarine Blue(caran D'ache) (#2111EF), which is clearly related but distinguishable side by side at a CIE76 distance of 7.26.

What is the RGB value of #0F21EB?

#0F21EB is rgb(15, 33, 235) — red 15, green 33, and blue 235 on the 0-255 scale.

What is the CMYK value of #0F21EB?

#0F21EB converts to approximately cmyk(94%, 86%, 0%, 8%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #0F21EB be black or white?

White text is the more readable choice. #0F21EB scores 8.62:1 against white and 2.44:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #0F21EB as a CSS color keyword?

No. #0F21EB 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 9.08, which is clearly related but distinguishable side by side.

Open #0F21EB 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.