Strong Blue #0C06F7
Strong Blue is a dark, vivid blue with hex code #0C06F7 and RGB rgb(12, 6, 247).
Aa
White text reads best on this color (8.80:1).
About this color
#0C06F7 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.303 and its hue 265°. Its hue sits on the cool side of the wheel. It is the named color Strong Blue. White text reads best on it, at 8.80:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.303) |
| Temperature | cool |
| Nearest name | Strong Blue |
| Black text | 2.38:1 |
| White text | 8.80:1 |
Colors that go with Strong Blue
Matches found by rotating Strong Blue around the OKLCH hue wheel, each labelled with the closest name in our list.
Complementary
The opposite hue (180°).
Analogous
Neighbouring hues, 30° either side.
Triadic
Three hues spaced 120° apart.
Color palettes with Strong Blue
Curated color palettes that contain a color within ΔE 0.06 (OKLab) of Strong Blue, closest first.
No curated palette has a color within ΔE 0.06 of Strong Blue yet.
Similar named colors
The eight named colors closest to Strong Blue, with their ΔE distance.
- Primary Blue #0804F9 ΔE 0.004
- Rich Blue #021BF9 ΔE 0.012
- Blue #0000FF ΔE 0.013
- Pure Blue #0203E2 ΔE 0.036
- Vivid Blue #152EFF ΔE 0.039
- Ultramarine Blue #1805DB ΔE 0.046
- Vibrant Blue #0339F8 ΔE 0.047
- Light Royal Blue #3A2EFE ΔE 0.063
More about Strong Blue
How to make Strong Blue
A starting recipe from common paint colors, found with a spectral paint model (the color mixer’s paint mode). Real pigments vary, so mix a small test batch and adjust.
- 1 part blue
Recipe result: #1F4FB3, a difference of ΔE 0.136 from Strong Blue. Strong Blue is more vivid than these paints can mix, so start from a ready-made blue paint and adjust it.
Codes for Strong Blue in every format
| HEX | #0C06F7 |
| RGB | rgb(12, 6, 247) |
| HSL | hsl(241, 95%, 50%) |
| OKLCH | oklch(44.5% 0.303 264.9) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #0C06F7 | 8.80:1 | AAA | Lc -91.6 | Preferred for body text |
| Black text on #0C06F7 | 2.38:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #0C06F7 text on white | 8.80:1 | AAA | Lc 86.9 | Fine for body text |
| #0C06F7 text on black | 2.38:1 | Fails | Lc -15.2 | Dividers and decoration only |
Shades and tints of Strong Blue
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7D9FF
oklch(88.4% 0.056 265.2)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#719CFF
oklch(70.6% 0.153 265)
-
Step 500
500
#4D80FF
oklch(63.2% 0.197 264.8)
-
Step 600
600
#295EFF
oklch(55.5% 0.245 264.9)
-
Step 700
700
#0F37FF
oklch(49.1% 0.287 264.9)
-
Step 800
800 (this color)
#0C06F7
oklch(44.5% 0.303 264.9)
-
Step 900
900
#061ABC
oklch(37.7% 0.237 264.9)
-
Step 950
950
#03166E
oklch(27.1% 0.15 264.8)
Strong Blue with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #0056FD | 0.100 |
| Deuteranopia (no green cones) | #003DF4 | 0.051 |
| Tritanopia (no blue cones) | #006891 | 0.225 |
| Achromatopsia (no color) | #4A4A4A | 0.305 |
Use Strong Blue in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.