#3F3147
Closest named color: Onyx (#343A40). oklch(33.8% 0.042 313), rgb(63, 49, 71).
Aa
White text reads best on this color (12.05:1).
About this color
#3F3147 is a dark, muted purple. In OKLCH its lightness is 34%, its chroma 0.042 and its hue 313°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.039 away. White text reads best on it, at 12.05:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | muted (0.042) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.74:1 |
| White text | 12.05:1 |
Values
| HEX | #3F3147 |
| RGB | rgb(63, 49, 71) |
| HSL | hsl(278, 18%, 24%) |
| OKLCH | oklch(33.8% 0.042 313) |
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 #3F3147 | 12.05:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #3F3147 | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #3F3147 text on white | 12.05:1 | AAA | Lc 97.6 | Preferred for body text |
| #3F3147 text on black | 1.74:1 | 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#ECE8EE
oklch(93.6% 0.009 314.8)
-
Step 200
200
#DDD6E2
oklch(88.5% 0.018 311.6)
-
Step 300
300
#C8BBCF
oklch(80.9% 0.031 314)
-
Step 400
400
#AC98B7
oklch(70.7% 0.05 313.6)
-
Step 500
500
#977EA6
oklch(63% 0.065 312.6)
-
Step 600
600
#826791
oklch(55.6% 0.071 313.2)
-
Step 700
700
#6E567B
oklch(49.2% 0.064 313.4)
-
Step 800
800
#594664
oklch(42.6% 0.054 312.8)
-
Step 900
900 (this color)
#3F3147
oklch(33.8% 0.042 313)
-
Step 950
950
#2B2330
oklch(27.1% 0.026 312.3)
#3F3147 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) | #2E3548 | 0.031 |
| Deuteranopia (no green cones) | #313746 | 0.030 |
| Tritanopia (no blue cones) | #3E3439 | 0.030 |
| Achromatopsia (no color) | #363636 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3147
#3F3147
oklch(33.8% 0.042 313)
- #2F3C25
#2F3C25
oklch(33.7% 0.042 132.3)
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 #3F3147, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.039
- Space Cadet #2B2D42 ΔE 0.040
- Gunmetal #293241 ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.054
- Charcoal Grey #3C4142 ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.069
- Charcoal #264653 ΔE 0.070
Use #3F3147 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.