#3B336B
Closest named color: Prussian Blue (#1D3557). oklch(36% 0.094 287.2), rgb(59, 51, 107).
Aa
White text reads best on this color (11.21:1).
About this color
#3B336B is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.094 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.058 away. White text reads best on it, at 11.21:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.87:1 |
| White text | 11.21:1 |
Values
| HEX | #3B336B |
| RGB | rgb(59, 51, 107) |
| HSL | hsl(249, 35%, 31%) |
| OKLCH | oklch(36% 0.094 287.2) |
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 #3B336B | 11.21:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #3B336B | 1.87:1 | Fails | Lc 8.1 | Not readable |
| #3B336B text on white | 11.21:1 | AAA | Lc 95.8 | Preferred for body text |
| #3B336B text on black | 1.87:1 | 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
#F5F5FC
oklch(97.2% 0.009 286.2)
-
Step 100
100
#E8E8F7
oklch(93.5% 0.02 286)
-
Step 200
200
#D7D6F2
oklch(88.6% 0.038 287.2)
-
Step 300
300
#BDBAEC
oklch(80.8% 0.07 287.5)
-
Step 400
400
#9C95E3
oklch(70.6% 0.113 287.2)
-
Step 500
500
#8579DB
oklch(63.1% 0.144 287.1)
-
Step 600
600
#7060C9
oklch(55.6% 0.157 287.1)
-
Step 700
700
#5E4FAD
oklch(49.1% 0.144 287.2)
-
Step 800
800
#4D418C
oklch(42.7% 0.12 287.6)
-
Step 900
900 (this color)
#3B336B
oklch(36% 0.094 287.2)
-
Step 950
950
#252142
oklch(27% 0.06 287.2)
#3B336B 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) | #1C3C6D | 0.046 |
| Deuteranopia (no green cones) | #1B396A | 0.045 |
| Tritanopia (no blue cones) | #2D3F4A | 0.079 |
| Achromatopsia (no color) | #3B3B3B | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B336B
#3B336B
oklch(36% 0.094 287.2)
- #423F00
#423F00
oklch(35.9% 0.077 106.7)
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 #3B336B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.058
- Marine Blue #01386A ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.063
- Twilight Blue #0A437A ΔE 0.065
- Dark Grey Blue #29465B ΔE 0.072
- Marine #042E60 ΔE 0.074
- Dark Blue Grey #1F3B4D ΔE 0.075
- Space Cadet #2B2D42 ΔE 0.079
Use #3B336B 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.