#3786BF
Closest named color: Cool Blue (#4984B8). oklch(59.7% 0.116 243.5), rgb(55, 134, 191).
Aa
Black text reads best on this color (5.32:1).
About this color
#3786BF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.116 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.016 away. Black text reads best on it, at 5.32:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.32:1 |
| White text | 3.94:1 |
Values
| HEX | #3786BF |
| RGB | rgb(55, 134, 191) |
| HSL | hsl(205, 55%, 48%) |
| OKLCH | oklch(59.7% 0.116 243.5) |
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 #3786BF | 3.94:1 | AA large text | Lc -72.0 | Content text, not long reading |
| Black text on #3786BF | 5.32:1 | AA | Lc 37.6 | Non-text elements, placeholder text |
| #3786BF text on white | 3.94:1 | AA large text | Lc 66.5 | Content text, not long reading |
| #3786BF text on black | 5.32:1 | AA | Lc -35.1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C8DCED
oklch(88.5% 0.032 243.7)
-
Step 300
300
#A2C6E3
oklch(81% 0.056 242.7)
-
Step 400
400
#6DA7D5
oklch(70.6% 0.091 243.5)
-
Step 500
500 (this color)
#3786BF
oklch(59.7% 0.116 243.5)
-
Step 600
600
#1A7AB7
oklch(55.7% 0.126 243.2)
-
Step 700
700
#07669D
oklch(49.1% 0.117 243.3)
-
Step 800
800
#0F5380
oklch(42.6% 0.098 244.2)
-
Step 900
900
#174566
oklch(37.6% 0.075 243.7)
-
Step 950
950
#0F293C
oklch(27.1% 0.048 243)
#3786BF 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) | #6C87C2 | 0.053 |
| Deuteranopia (no green cones) | #597ABE | 0.042 |
| Tritanopia (no blue cones) | #00949A | 0.083 |
| Achromatopsia (no color) | #808080 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3786BF
#3786BF
oklch(59.7% 0.116 243.5)
- #AF6E29
#AF6E29
oklch(59.6% 0.116 63.3)
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 #3786BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.016
- Steel Blue #4682B4 ΔE 0.020
- Water Blue #0E87CC ΔE 0.025
- Blue NCS #118AB2 ΔE 0.031
- Off Blue #5684AE ΔE 0.035
- Dusty Blue #5A86AD ΔE 0.040
- Windows Blue #3778BF ΔE 0.040
- Nice Blue #107AB0 ΔE 0.047
Use #3786BF 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.