#3682DD
Closest named color: Dark Sky Blue (#448EE4). oklch(60.5% 0.157 255), rgb(54, 130, 221).
Aa
Black text reads best on this color (5.39:1).
About this color
#3682DD is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.157 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.036 away. Black text reads best on it, at 5.39:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.39:1 |
| White text | 3.89:1 |
Values
| HEX | #3682DD |
| RGB | rgb(54, 130, 221) |
| HSL | hsl(213, 71%, 54%) |
| OKLCH | oklch(60.5% 0.157 255) |
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 #3682DD | 3.89:1 | AA large text | Lc -71.5 | Content text, not long reading |
| Black text on #3682DD | 5.39:1 | AA | Lc 38.1 | Non-text elements, placeholder text |
| #3682DD text on white | 3.89:1 | AA large text | Lc 66.0 | Content text, not long reading |
| #3682DD text on black | 5.39:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#9FC4F2
oklch(81% 0.077 254.1)
-
Step 400
400
#6AA3EC
oklch(70.7% 0.123 255.2)
-
Step 500
500 (this color)
#3682DD
oklch(60.5% 0.157 255)
-
Step 600
600
#1772D4
oklch(55.7% 0.171 254.9)
-
Step 700
700
#055FB8
oklch(49.2% 0.159 255)
-
Step 800
800
#0C4E95
oklch(42.8% 0.132 255)
-
Step 900
900
#154176
oklch(37.6% 0.102 255.3)
-
Step 950
950
#0E2745
oklch(27.1% 0.064 254.6)
#3682DD 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) | #5689E1 | 0.036 |
| Deuteranopia (no green cones) | #397ADB | 0.021 |
| Tritanopia (no blue cones) | #0097A5 | 0.119 |
| Achromatopsia (no color) | #818181 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3682DD
#3682DD
oklch(60.5% 0.157 255)
- #AE7500
#AE7500
oklch(60.7% 0.128 75.1)
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 #3682DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.036
- Water Blue #0E87CC ΔE 0.036
- Windows Blue #3778BF ΔE 0.050
- Soft Blue #6488EA ΔE 0.052
- Clear Blue #247AFD ΔE 0.056
- Dodger Blue #1E90FF ΔE 0.057
- Chefchaouen Blue #4895EF ΔE 0.058
- Cool Blue #4984B8 ΔE 0.060
Use #3682DD 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.