#3B3168
Closest named color: Prussian Blue (#1D3557). oklch(35.3% 0.093 289.1), rgb(59, 49, 104).
Aa
White text reads best on this color (11.50:1).
About this color
#3B3168 is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.093 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.056 away. White text reads best on it, at 11.50:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.82:1 |
| White text | 11.50:1 |
Values
| HEX | #3B3168 |
| RGB | rgb(59, 49, 104) |
| HSL | hsl(251, 36%, 30%) |
| OKLCH | oklch(35.3% 0.093 289.1) |
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 #3B3168 | 11.50:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #3B3168 | 1.82:1 | Fails | Lc 7.5 | Not readable |
| #3B3168 text on white | 11.50:1 | AAA | Lc 96.3 | Preferred for body text |
| #3B3168 text on black | 1.82:1 | 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
#E9E8F7
oklch(93.6% 0.02 289.1)
-
Step 200
200
#D8D6F2
oklch(88.6% 0.038 288.9)
-
Step 300
300
#BFBAEB
oklch(81% 0.069 289.4)
-
Step 400
400
#9F95E2
oklch(70.8% 0.111 289.2)
-
Step 500
500
#8878D9
oklch(63% 0.143 289.2)
-
Step 600
600
#735FC6
oklch(55.5% 0.154 289.3)
-
Step 700
700
#614EAB
oklch(49.1% 0.143 289.5)
-
Step 800
800
#4F418B
oklch(42.8% 0.118 289.1)
-
Step 900
900 (this color)
#3B3168
oklch(35.3% 0.093 289.1)
-
Step 950
950
#262141
oklch(27.1% 0.058 289.1)
#3B3168 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) | #1A3A6A | 0.049 |
| Deuteranopia (no green cones) | #1B3867 | 0.047 |
| Tritanopia (no blue cones) | #2E3C47 | 0.077 |
| Achromatopsia (no color) | #393939 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3168
#3B3168
oklch(35.3% 0.093 289.1)
- #3F3E00
#3F3E00
oklch(35.3% 0.076 108.7)
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 #3B3168, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.056
- Marine Blue #01386A ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.069
- Twilight Blue #0A437A ΔE 0.070
- Marine #042E60 ΔE 0.072
- Space Cadet #2B2D42 ΔE 0.074
- Dark Blue Grey #1F3B4D ΔE 0.074
- Dark Grey Blue #29465B ΔE 0.075
Use #3B3168 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.