#3F2F69
Closest named color: Prussian Blue (#1D3557). oklch(35.4% 0.098 293.5), rgb(63, 47, 105).
Aa
White text reads best on this color (11.52:1).
About this color
#3F2F69 is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.098 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.064 away. White text reads best on it, at 11.52:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.098) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.82:1 |
| White text | 11.52:1 |
Values
| HEX | #3F2F69 |
| RGB | rgb(63, 47, 105) |
| HSL | hsl(257, 38%, 30%) |
| OKLCH | oklch(35.4% 0.098 293.5) |
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 #3F2F69 | 11.52:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #3F2F69 | 1.82:1 | Fails | Lc 7.5 | Not readable |
| #3F2F69 text on white | 11.52:1 | AAA | Lc 96.3 | Preferred for body text |
| #3F2F69 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE7F7
oklch(93.5% 0.022 294.6)
-
Step 200
200
#DAD5F2
oklch(88.6% 0.04 293.5)
-
Step 300
300
#C2B8EC
oklch(80.8% 0.073 293.5)
-
Step 400
400
#A492E3
oklch(70.7% 0.117 293.4)
-
Step 500
500
#8F75DA
oklch(63.1% 0.149 293.5)
-
Step 600
600
#7A5BC8
oklch(55.6% 0.163 293.5)
-
Step 700
700
#674AAD
oklch(49.1% 0.152 293.5)
-
Step 800
800
#543D8C
oklch(42.7% 0.126 293.8)
-
Step 900
900 (this color)
#3F2F69
oklch(35.4% 0.098 293.5)
-
Step 950
950
#282041
oklch(27% 0.06 293.1)
#3F2F69 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) | #173A6B | 0.060 |
| Deuteranopia (no green cones) | #1A3868 | 0.056 |
| Tritanopia (no blue cones) | #353B47 | 0.079 |
| Achromatopsia (no color) | #393939 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F2F69
#3F2F69
oklch(35.4% 0.098 293.5)
- #3C4000
#3C4000
oklch(35.6% 0.08 113.7)
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 #3F2F69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.068
- Marine Blue #01386A ΔE 0.072
- Twilight Blue #0A437A ΔE 0.077
- Space Cadet #2B2D42 ΔE 0.079
- Marine #042E60 ΔE 0.079
- Royal Purple #4B006E ΔE 0.081
- Dark Blue Grey #1F3B4D ΔE 0.082
Use #3F2F69 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.