#3B4284
Closest named color: Dark Slate Blue (#483D8B). oklch(40.9% 0.109 275.9), rgb(59, 66, 132).
Aa
White text reads best on this color (9.13:1).
About this color
#3B4284 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.109 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.026 away. White text reads best on it, at 9.13:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.29:1 |
| White text | 9.13:1 |
Values
| HEX | #3B4284 |
| RGB | rgb(59, 66, 132) |
| HSL | hsl(234, 38%, 37%) |
| OKLCH | oklch(40.9% 0.109 275.9) |
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 #3B4284 | 9.13:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #3B4284 | 2.29:1 | Fails | Lc 13.1 | Not readable |
| #3B4284 text on white | 9.13:1 | AAA | Lc 90.8 | Preferred for body text |
| #3B4284 text on black | 2.29:1 | Fails | Lc -11.5 | Not readable |
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 800.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F1
oklch(88.5% 0.035 274.9)
-
Step 300
300
#B5BEEA
oklch(80.9% 0.063 275.9)
-
Step 400
400
#8F9BE0
oklch(70.7% 0.102 275.9)
-
Step 500
500
#7481D7
oklch(63.1% 0.13 275.5)
-
Step 600
600
#5E69C5
oklch(55.7% 0.142 275.7)
-
Step 700
700
#4E57AA
oklch(49.2% 0.131 275.8)
-
Step 800
800 (this color)
#3B4284
oklch(40.9% 0.109 275.9)
-
Step 900
900
#363C6E
oklch(37.7% 0.085 276.3)
-
Step 950
950
#1F2440
oklch(27% 0.052 274.7)
#3B4284 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) | #234B86 | 0.034 |
| Deuteranopia (no green cones) | #1A4583 | 0.037 |
| Tritanopia (no blue cones) | #19515C | 0.098 |
| Achromatopsia (no color) | #484848 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B4284
#3B4284
oklch(40.9% 0.109 275.9)
- #584900
#584900
oklch(40.9% 0.084 95.5)
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 #3B4284, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.026
- Blueberry #464196 ΔE 0.035
- Cobalt #1E488F ΔE 0.037
- Dusk Blue #26538D ΔE 0.050
- Light Navy #155084 ΔE 0.051
- Twilight Blue #0A437A ΔE 0.052
- Twilight #4E518B ΔE 0.054
- Dusk #4E5481 ΔE 0.063
Use #3B4284 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.