#3F394F
Closest named color: Onyx (#343A40). oklch(36% 0.038 296.9), rgb(63, 57, 79).
Aa
White text reads best on this color (10.99:1).
About this color
#3F394F is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.038 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.034 away. White text reads best on it, at 10.99:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.038) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.90:1 |
| White text | 10.99:1 |
Values
| HEX | #3F394F |
| RGB | rgb(63, 57, 79) |
| HSL | hsl(256, 16%, 27%) |
| OKLCH | oklch(36% 0.038 296.9) |
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 #3F394F | 10.99:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #3F394F | 1.90:1 | Fails | Lc 8.4 | Not readable |
| #3F394F text on white | 10.99:1 | AAA | Lc 95.5 | Preferred for body text |
| #3F394F text on black | 1.90:1 | 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
#F6F5F8
oklch(97.2% 0.004 301.4)
-
Step 100
100
#EAE9EF
oklch(93.7% 0.008 293.9)
-
Step 200
200
#DAD7E3
oklch(88.5% 0.017 297.5)
-
Step 300
300
#C2BDD1
oklch(80.9% 0.028 297.2)
-
Step 400
400
#A39BBA
oklch(70.7% 0.045 297)
-
Step 500
500
#8D82A9
oklch(63% 0.059 297.6)
-
Step 600
600
#776C95
oklch(55.7% 0.064 296.6)
-
Step 700
700
#645A7F
oklch(49.2% 0.059 296.6)
-
Step 800
800
#524967
oklch(42.7% 0.05 298)
-
Step 900
900 (this color)
#3F394F
oklch(36% 0.038 296.9)
-
Step 950
950
#272431
oklch(26.9% 0.024 295.3)
#3F394F 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) | #343C50 | 0.019 |
| Deuteranopia (no green cones) | #353C4E | 0.019 |
| Tritanopia (no blue cones) | #3C3C41 | 0.030 |
| Achromatopsia (no color) | #3C3C3C | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F394F
#3F394F
oklch(36% 0.038 296.9)
- #3C4029
#3C4029
oklch(36.1% 0.038 116.4)
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 #3F394F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.034
- Charcoal Grey #3C4142 ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.047
- Gunmetal #293241 ΔE 0.050
- Charcoal #264653 ΔE 0.050
- Prussian Blue #1D3557 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.056
Use #3F394F 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.