#3786C8
Closest named color: Water Blue (#0E87CC). oklch(60.2% 0.127 247.2), rgb(55, 134, 200).
Aa
Black text reads best on this color (5.40:1).
About this color
#3786C8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.127 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.018 away. Black text reads best on it, at 5.40:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.40:1 |
| White text | 3.88:1 |
Values
| HEX | #3786C8 |
| RGB | rgb(55, 134, 200) |
| HSL | hsl(207, 57%, 50%) |
| OKLCH | oklch(60.2% 0.127 247.2) |
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 #3786C8 | 3.88:1 | AA large text | Lc -71.5 | Content text, not long reading |
| Black text on #3786C8 | 5.40:1 | AA | Lc 38.1 | Non-text elements, placeholder text |
| #3786C8 text on white | 3.88:1 | AA large text | Lc 66.0 | Content text, not long reading |
| #3786C8 text on black | 5.40:1 | AA | Lc -35.7 | 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
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCEF
oklch(88.5% 0.034 246.8)
-
Step 300
300
#A1C5E7
oklch(80.9% 0.062 247.1)
-
Step 400
400
#6CA6DB
oklch(70.6% 0.099 247.2)
-
Step 500
500 (this color)
#3786C8
oklch(60.2% 0.127 247.2)
-
Step 600
600
#1878BF
oklch(55.7% 0.138 247.2)
-
Step 700
700
#0464A5
oklch(49% 0.129 247.6)
-
Step 800
800
#0D5285
oklch(42.7% 0.106 247.2)
-
Step 900
900
#16446B
oklch(37.6% 0.083 247.9)
-
Step 950
950
#0E283F
oklch(26.9% 0.054 248)
#3786C8 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) | #6889CB | 0.049 |
| Deuteranopia (no green cones) | #537BC7 | 0.036 |
| Tritanopia (no blue cones) | #00969E | 0.093 |
| Achromatopsia (no color) | #818181 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3786C8
#3786C8
oklch(60.2% 0.127 247.2)
- #B27015
#B27015
oklch(60.3% 0.126 67.5)
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 #3786C8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.018
- Cool Blue #4984B8 ΔE 0.026
- Steel Blue #4682B4 ΔE 0.031
- Windows Blue #3778BF ΔE 0.039
- Blue NCS #118AB2 ΔE 0.044
- Off Blue #5684AE ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.047
- Dusty Blue #5A86AD ΔE 0.050
Use #3786C8 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.