#3686DC
Closest named color: Dark Sky Blue (#448EE4). oklch(61.3% 0.152 253), rgb(54, 134, 220).
Aa
Black text reads best on this color (5.60:1).
About this color
#3686DC is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.152 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.027 away. Black text reads best on it, at 5.60:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.60:1 |
| White text | 3.74:1 |
Values
| HEX | #3686DC |
| RGB | rgb(54, 134, 220) |
| HSL | hsl(211, 70%, 54%) |
| OKLCH | oklch(61.3% 0.152 253) |
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 #3686DC | 3.74:1 | AA large text | Lc -70.2 | Content text, not long reading |
| Black text on #3686DC | 5.60:1 | AA | Lc 39.4 | Non-text elements, placeholder text |
| #3686DC text on white | 3.74:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #3686DC text on black | 5.60:1 | AA | Lc -37.0 | Non-text elements, placeholder text |
Tints and shades
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 500.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DBF4
oklch(88.4% 0.041 254)
-
Step 300
300
#9FC4F0
oklch(80.9% 0.074 253.1)
-
Step 400
400
#69A4E9
oklch(70.7% 0.119 253.2)
-
Step 500
500 (this color)
#3686DC
oklch(61.3% 0.152 253)
-
Step 600
600
#0F73D0
oklch(55.5% 0.166 253.1)
-
Step 700
700
#0060B3
oklch(49% 0.152 253.2)
-
Step 800
800
#074F92
oklch(42.7% 0.127 253.1)
-
Step 900
900
#134274
oklch(37.6% 0.099 253.2)
-
Step 950
950
#0D2744
oklch(27% 0.063 253.3)
#3686DC 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) | #5D8CDF | 0.040 |
| Deuteranopia (no green cones) | #437DDA | 0.024 |
| Tritanopia (no blue cones) | #009AA6 | 0.114 |
| Achromatopsia (no color) | #848484 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3686DC
#3686DC
oklch(61.3% 0.152 253)
- #B37500
#B37500
oklch(61.3% 0.131 72.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #3686DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.027
- Water Blue #0E87CC ΔE 0.032
- Soft Blue #6488EA ΔE 0.049
- Chefchaouen Blue #4895EF ΔE 0.050
- Windows Blue #3778BF ΔE 0.054
- Dodger Blue #1E90FF ΔE 0.054
- Cool Blue #4984B8 ΔE 0.055
- Steel Blue #4682B4 ΔE 0.060
Use #3686DC 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.