#155DFC Color

#155DFC is rgb(21, 93, 252) in RGB, hsl(221, 97%, 54%) in HSL, and about cmyk(92%, 63%, 0%, 1%) in CMYK. It has no registered color name of its own — the closest is Philippine Sky Blue (#0066FF), clearly related but distinguishable side by side at ΔE 6. White text is the more readable choice on this background.

#155DFC

HEX#155DFC

RGBrgb(21, 93, 252)

HSLhsl(221, 97%, 54%)

HSVhsv(221, 92%, 99%)

CMYKcmyk(92%, 63%, 0%, 1%)

OKLCHoklch(54.7% 0.246 262.9)

LABlab(44.11% 29.12 -86.22)

LCHlch(44.11% 91.01 288.66)

What #155DFC 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 #155DFC, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Philippine Sky Blue#0066FFΔE 6 Ultramarine Blue#4166F5ΔE 10.31 Very Light Blue#6666FFΔE 11.7 Vantg Blue#5271FFΔE 13.73 Palatinate Blue#273BE2ΔE 16.28 Majorelle Blue#6050DCΔE 17.1

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

#155DFC Channel Values

How #155DFC breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

Model	Channels	Notes
RGB	R 21 · G 93 · B 252	8-bit channels as sent to the display
HSL	H 221° · S 97% · L 54%	Easiest model for building lighter and darker variants
HSV	H 221° · S 92% · V 99%	Matches the picker in most design tools
CMYK	C 92% · M 63% · Y 0% · K 1%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	5.25:1 vs white · 4:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #155DFC 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 text5.25:1AA normal AA large AAA normal

Fails AABlack text4:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #155DFC in the contrast checker.

Colors That Go With #155DFC

Pairings derived from color-wheel relationships. The complementary color sits opposite #155DFC; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base

Complementary

Analogous

Analogous

Triadic

Triadic

Split comp.

Split comp.

Tints & Shades of #155DFC

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

Shades

Want a full 50-950 ramp with semantic roles? Generate design tokens from #155DFC.

How #155DFC 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#155DFC

Protanopia#5656FC

Protanomaly#4459FC

Deuteranopia#4E4EFC

Deuteranomaly#3E54FC

Tritanopia#008181

Tritanomaly#0074BF

Achromatopsia#6C6C6C

Test a full palette in the color blindness simulator.

Using #155DFC in Code

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

CSS custom property--color-155dfc: #155DFC;

CSS backgroundbackground-color: #155DFC;

Tailwind configcolors: { 'color-155dfc': '#155DFC' }

SwiftUIColor(red: 0.082, green: 0.365, blue: 0.988)

Android XML<color name="color_155dfc">#155DFC</color>

SVG fillfill="#155DFC"

More Blue Colors

#155DFC sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

1560bd 154cb2 161664 1447e6 162456 132c77 172436 13135e 173796 130e2f 18187b 12279e 214fc6 318ce7 417dc1 566371 6b7c93 87d3f8 a2add0 c3cde6 e0e7ff 000047 003366 024a70

#155DFC Frequently Asked Questions

What color is #155DFC?

#155DFC is a mid-tone blue — rgb(21, 93, 252) in RGB and hsl(221, 97%, 54%) in HSL. It carries no registered color name of its own; the closest named color is Philippine Sky Blue (#0066FF), which is clearly related but distinguishable side by side at a CIE76 distance of 6.

What is the RGB value of #155DFC?

#155DFC is rgb(21, 93, 252) — red 21, green 93, and blue 252 on the 0-255 scale.

What is the CMYK value of #155DFC?

#155DFC converts to approximately cmyk(92%, 63%, 0%, 1%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #155DFC be black or white?

White text is the more readable choice. #155DFC scores 5.25:1 against white and 4:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #155DFC as a CSS color keyword?

No. #155DFC 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 mediumslateblue (#7B68EE) at a CIE76 distance of 21.53, which is visibly different.

Open #155DFC in a Tool

Hex to RGB Hex to HSL Hex to CMYK Hex to OKLCH Hex to Pantone Build a palette Make a gradient

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