HSL to HEX: #1E90FF

Result

Values are shown at full precision, so converting back gives exactly #1e90ff. The rounded form is what you normally paste into CSS.

Step-by-step math

Every number below is computed from the input, nothing is looked up.

1. 1. input

   H = 209.60°, S = 100.00%, L = 55.88%

2. 2. C

   C = (1 − |2L − 1|) × S = 0.88240

3. 3. X

   X = C × (1 − |(H / 60°) mod 2 − 1|) = 0.44708   (H / 60° = 3.4933, sector 3)

4. 4. m

   m = L − C / 2 = 0.11760

5. 5. (R′, G′, B′) + m

   (R′, G′, B′) = (0.00000, 0.44708, 0.88240)
   R = round((0.00000 + 0.11760) × 255) = 30
   G = round((0.44708 + 0.11760) × 255) = 144
   B = round((0.88240 + 0.11760) × 255) = 255

6. 6. RGB → HEX

   #1E90FF

All formats

HEX

#1e90ff

RGB

rgb(30 144 255)

RGB (legacy)

rgb(30, 144, 255)

HSL

hsl(209.60 100.00% 55.88%) → hsl(210 100% 56%)

HWB

hwb(210 12% 0%)

OKLCH

oklch(0.652 0.190 253.2) · oklch(65.2% 0.190 253.2)

OKLab

oklab(0.652 -0.055 -0.182)

Lab (D50)

lab(58.36 0.89 -64.78)

LCH (D50)

lch(58.36 64.79 270.79)

Display P3

color(display-p3 0.2721 0.5565 0.9690)

Linear sRGB

color(srgb-linear 0.0130 0.2789 1.0000)

Gamut: sRGB and Display P3

#1E90FF is a hex color, so it sits inside sRGB and therefore inside Display P3. At this lightness and hue, sRGB reaches chroma 0.190 and Display P3 reaches 0.205; this color uses 100% of the sRGB chroma available.

CSS snippets

.element {
  color: #1e90ff;
  color: rgb(30 144 255);
  color: hsl(210 100% 56%);
  color: oklch(0.652 0.190 253.2);
}

/* Tailwind CSS v4 */
@theme {
  --color-brand: oklch(0.652 0.190 253.2);
}
/* arbitrary values */
class="text-[#1e90ff] bg-[oklch(0.652_0.190_253.2)]"

/* wide-gamut screens */
@media (color-gamut: p3) {
  .element { color: color(display-p3 0.2721 0.5565 0.9690); }
}

/* relative color syntax: 10% darker */
.element-dark { color: oklch(from #1e90ff calc(l - 0.1) c h); }

Nearby colors

Closest colors in the Tailwind and CSS named palettes (OKLab distance).

• v3 blue-500#3B82F6
• blue-500#2B7FFF
• cornflowerblue#6495ED
• blue-400#51A2FF
• sky-500#00A6F4
• v3 sky-500#0EA5E9
• sky-600#0084D1
• v3 blue-400#60A5FA

Lighter and darker, same hue and chroma

• #38A3FF · oklch(0.712 0.190 253.2) · ΔL +0.06
• #007DEA · oklch(0.592 0.190 253.2) · ΔL −0.06

Open in the studio