#3F394D
Closest named color: Onyx (#343A40). oklch(35.9% 0.035 298.4), rgb(63, 57, 77).
Aa
White text reads best on this color (11.03:1).
About this color
#3F394D is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.035 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.032 away. White text reads best on it, at 11.03:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.035) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.90:1 |
| White text | 11.03:1 |
Values
| HEX | #3F394D |
| RGB | rgb(63, 57, 77) |
| HSL | hsl(258, 15%, 26%) |
| OKLCH | oklch(35.9% 0.035 298.4) |
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 #3F394D | 11.03:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #3F394D | 1.90:1 | Fails | Lc 8.4 | Not readable |
| #3F394D text on white | 11.03:1 | AAA | Lc 95.5 | Preferred for body text |
| #3F394D 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EAE9EE
oklch(93.6% 0.007 295.4)
-
Step 200
200
#DAD7E2
oklch(88.5% 0.015 298.5)
-
Step 300
300
#C2BDD0
oklch(80.8% 0.027 297.8)
-
Step 400
400
#A39BB8
oklch(70.6% 0.043 297.9)
-
Step 500
500
#8D83A6
oklch(63.1% 0.053 298)
-
Step 600
600
#776C91
oklch(55.5% 0.058 298.1)
-
Step 700
700
#645A7C
oklch(49% 0.055 297.8)
-
Step 800
800
#524A65
oklch(42.8% 0.045 298.1)
-
Step 900
900 (this color)
#3F394D
oklch(35.9% 0.035 298.4)
-
Step 950
950
#282430
oklch(27% 0.023 300.1)
#3F394D 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) | #353C4E | 0.018 |
| Deuteranopia (no green cones) | #363C4C | 0.017 |
| Tritanopia (no blue cones) | #3D3C40 | 0.028 |
| Achromatopsia (no color) | #3C3C3C | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F394D
#3F394D
oklch(35.9% 0.035 298.4)
- #3B402B
#3B402B
oklch(36% 0.035 119.1)
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 #3F394D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.032
- Charcoal Grey #3C4142 ΔE 0.037
- Dark Blue Grey #1F3B4D ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.048
- Gunmetal #293241 ΔE 0.049
- Charcoal #264653 ΔE 0.050
- Space Cadet #2B2D42 ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.057
Use #3F394D 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.