#3786D0
Closest named color: Water Blue (#0E87CC). oklch(60.7% 0.136 249.9), rgb(55, 134, 208).
Aa
Black text reads best on this color (5.48:1).
About this color
#3786D0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.136 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.020 away. Black text reads best on it, at 5.48:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.48:1 |
| White text | 3.82:1 |
Values
| HEX | #3786D0 |
| RGB | rgb(55, 134, 208) |
| HSL | hsl(209, 62%, 52%) |
| OKLCH | oklch(60.7% 0.136 249.9) |
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 #3786D0 | 3.82:1 | AA large text | Lc -71.0 | Content text, not long reading |
| Black text on #3786D0 | 5.48:1 | AA | Lc 38.6 | Non-text elements, placeholder text |
| #3786D0 text on white | 3.82:1 | AA large text | Lc 65.5 | Content text, not long reading |
| #3786D0 text on black | 5.48:1 | AA | Lc -36.2 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C7DCF1
oklch(88.5% 0.037 248.2)
-
Step 300
300
#A0C5EB
oklch(81% 0.067 249.3)
-
Step 400
400
#6BA5E1
oklch(70.6% 0.107 250.3)
-
Step 500
500 (this color)
#3786D0
oklch(60.7% 0.136 249.9)
-
Step 600
600
#1576C6
oklch(55.6% 0.149 250)
-
Step 700
700
#0263AB
oklch(49.2% 0.138 249.9)
-
Step 800
800
#0B518A
oklch(42.7% 0.114 249.8)
-
Step 900
900
#15446F
oklch(37.9% 0.089 249.9)
-
Step 950
950
#0E2841
oklch(27.1% 0.057 249.9)
#3786D0 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) | #648AD3 | 0.045 |
| Deuteranopia (no green cones) | #4E7CCF | 0.030 |
| Tritanopia (no blue cones) | #0098A1 | 0.103 |
| Achromatopsia (no color) | #828282 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3786D0
#3786D0
oklch(60.7% 0.136 249.9)
- #B37200
#B37200
oklch(60.7% 0.131 70.4)
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 #3786D0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.020
- Cool Blue #4984B8 ΔE 0.037
- Dark Sky Blue #448EE4 ΔE 0.037
- Steel Blue #4682B4 ΔE 0.042
- Windows Blue #3778BF ΔE 0.043
- Blue NCS #118AB2 ΔE 0.055
- Off Blue #5684AE ΔE 0.056
- Faded Blue #658CBB ΔE 0.058
Use #3786D0 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.