#3B3161
Closest named color: Prussian Blue (#1D3557). oklch(34.9% 0.082 291.1), rgb(59, 49, 97).
Aa
White text reads best on this color (11.68:1).
About this color
#3B3161 is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.082 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.050 away. White text reads best on it, at 11.68:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.082) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.79:1 |
| White text | 11.68:1 |
Values
| HEX | #3B3161 |
| RGB | rgb(59, 49, 97) |
| HSL | hsl(252, 33%, 29%) |
| OKLCH | oklch(34.9% 0.082 291.1) |
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 #3B3161 | 11.68:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #3B3161 | 1.79:1 | Fails | Lc 0.0 | Not readable |
| #3B3161 text on white | 11.68:1 | AAA | Lc 96.7 | Preferred for body text |
| #3B3161 text on black | 1.79:1 | Fails | Lc 0.0 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E9E8F5
oklch(93.6% 0.017 289.6)
-
Step 200
200
#D9D6EF
oklch(88.6% 0.034 291.2)
-
Step 300
300
#C0BAE6
oklch(80.8% 0.062 291.2)
-
Step 400
400
#A196D9
oklch(70.8% 0.097 291.2)
-
Step 500
500
#8A7ACF
oklch(63% 0.126 291)
-
Step 600
600
#7562BC
oklch(55.6% 0.136 291)
-
Step 700
700
#6251A2
oklch(49.1% 0.126 290.7)
-
Step 800
800
#504283
oklch(42.6% 0.105 291.2)
-
Step 900
900 (this color)
#3B3161
oklch(34.9% 0.082 291.1)
-
Step 950
950
#27213E
oklch(27% 0.053 291.9)
#3B3161 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) | #203963 | 0.043 |
| Deuteranopia (no green cones) | #213760 | 0.041 |
| Tritanopia (no blue cones) | #313A44 | 0.067 |
| Achromatopsia (no color) | #383838 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3161
#3B3161
oklch(34.9% 0.082 291.1)
- #3C3D00
#3C3D00
oklch(34.7% 0.076 110.8)
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 #3B3161, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.050
- Space Cadet #2B2D42 ΔE 0.063
- Marine Blue #01386A ΔE 0.064
- Dark Blue Grey #1F3B4D ΔE 0.066
- Gunmetal #293241 ΔE 0.067
- Dark Grey Blue #29465B ΔE 0.070
- Marine #042E60 ΔE 0.071
- Onyx #343A40 ΔE 0.073
Use #3B3161 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.