#3186DF
Closest named color: Dark Sky Blue (#448EE4). oklch(61.4% 0.157 252.8), rgb(49, 134, 223).
Aa
Black text reads best on this color (5.60:1).
About this color
#3186DF is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.157 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.028 away. Black text reads best on it, at 5.60:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.60:1 |
| White text | 3.74:1 |
Values
| HEX | #3186DF |
| RGB | rgb(49, 134, 223) |
| HSL | hsl(211, 73%, 53%) |
| OKLCH | oklch(61.4% 0.157 252.8) |
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 #3186DF | 3.74:1 | AA large text | Lc -70.1 | Content text, not long reading |
| Black text on #3186DF | 5.60:1 | AA | Lc 39.5 | Non-text elements, placeholder text |
| #3186DF text on white | 3.74:1 | AA large text | Lc 64.6 | Content text, not long reading |
| #3186DF text on black | 5.60:1 | AA | Lc -37.1 | 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
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DCF5
oklch(88.6% 0.042 251.7)
-
Step 300
300
#9EC4F2
oklch(80.9% 0.077 253.5)
-
Step 400
400
#66A4EB
oklch(70.7% 0.123 252.9)
-
Step 500
500 (this color)
#3186DF
oklch(61.4% 0.157 252.8)
-
Step 600
600
#0073D3
oklch(55.6% 0.171 252.9)
-
Step 700
700
#0061B2
oklch(49.2% 0.149 252.5)
-
Step 800
800
#004F94
oklch(42.8% 0.131 252.8)
-
Step 900
900
#0F4276
oklch(37.7% 0.103 253)
-
Step 950
950
#0B2745
oklch(26.9% 0.065 252.8)
#3186DF 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) | #5B8CE3 | 0.041 |
| Deuteranopia (no green cones) | #3E7DDD | 0.024 |
| Tritanopia (no blue cones) | #009BA8 | 0.117 |
| Achromatopsia (no color) | #848484 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3186DF
#3186DF
oklch(61.4% 0.157 252.8)
- #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 #3186DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.028
- Water Blue #0E87CC ΔE 0.034
- Chefchaouen Blue #4895EF ΔE 0.050
- Soft Blue #6488EA ΔE 0.050
- Dodger Blue #1E90FF ΔE 0.051
- Windows Blue #3778BF ΔE 0.056
- Clear Blue #247AFD ΔE 0.059
- Cool Blue #4984B8 ΔE 0.060
Use #3186DF 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.