#3D3D84
Closest named color: Dark Slate Blue (#483D8B). oklch(40% 0.116 279.8), rgb(61, 61, 132).
Aa
White text reads best on this color (9.54:1).
About this color
#3D3D84 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.116 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.021 away. White text reads best on it, at 9.54:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.19:1 |
| White text | 9.54:1 |
Values
| HEX | #3D3D84 |
| RGB | rgb(61, 61, 132) |
| HSL | hsl(240, 37%, 38%) |
| OKLCH | oklch(40% 0.116 279.8) |
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 #3D3D84 | 9.54:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #3D3D84 | 2.19:1 | Fails | Lc 12.1 | Not readable |
| #3D3D84 text on white | 9.54:1 | AAA | Lc 91.9 | Preferred for body text |
| #3D3D84 text on black | 2.19:1 | Fails | Lc -10.5 | 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 900.
-
Step 50
50
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E8FB
oklch(93.5% 0.026 281.1)
-
Step 200
200
#D2D6F9
oklch(88.4% 0.048 280.2)
-
Step 300
300
#B5BBF9
oklch(80.9% 0.088 279.9)
-
Step 400
400
#9095F5
oklch(70.6% 0.139 279.9)
-
Step 500
500
#7778F1
oklch(63.1% 0.177 279.7)
-
Step 600
600
#625DE0
oklch(55.6% 0.193 279.8)
-
Step 700
700
#524BC2
oklch(49% 0.18 280.1)
-
Step 800
800
#423F9D
oklch(42.7% 0.148 279.5)
-
Step 900
900 (this color)
#3D3D84
oklch(40% 0.116 279.8)
-
Step 950
950
#202149
oklch(27.1% 0.073 279.3)
#3D3D84 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) | #184886 | 0.047 |
| Deuteranopia (no green cones) | #0F4382 | 0.050 |
| Tritanopia (no blue cones) | #1F4D5A | 0.101 |
| Achromatopsia (no color) | #454545 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D3D84
#3D3D84
oklch(40% 0.116 279.8)
- #524800
#524800
oklch(39.9% 0.083 100.2)
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 #3D3D84, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.021
- Blueberry #464196 ΔE 0.035
- Cobalt #1E488F ΔE 0.045
- Twilight Blue #0A437A ΔE 0.056
- Light Navy #155084 ΔE 0.063
- Dusk Blue #26538D ΔE 0.063
- Twilight #4E518B ΔE 0.064
- Dusk #4E5481 ΔE 0.074
Use #3D3D84 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.