#3F3755
Closest named color: Onyx (#343A40). oklch(35.8% 0.052 295.9), rgb(63, 55, 85).
Aa
White text reads best on this color (11.11:1).
About this color
#3F3755 is a dark, muted purple. In OKLCH its lightness is 36%, its chroma 0.052 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.046 away. White text reads best on it, at 11.11:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | muted (0.052) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.88:1 |
| White text | 11.11:1 |
Values
| HEX | #3F3755 |
| RGB | rgb(63, 55, 85) |
| HSL | hsl(256, 21%, 27%) |
| OKLCH | oklch(35.8% 0.052 295.9) |
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 #3F3755 | 11.11:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #3F3755 | 1.88:1 | Fails | Lc 8.2 | Not readable |
| #3F3755 text on white | 11.11:1 | AAA | Lc 95.7 | Preferred for body text |
| #3F3755 text on black | 1.88:1 | 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
#F6F5F9
oklch(97.2% 0.005 297.7)
-
Step 100
100
#EAE8F1
oklch(93.5% 0.012 296.3)
-
Step 200
200
#DAD6E6
oklch(88.4% 0.022 297.4)
-
Step 300
300
#C2BCD8
oklch(80.9% 0.04 295.3)
-
Step 400
400
#A399C4
oklch(70.6% 0.063 295.4)
-
Step 500
500
#8D80B5
oklch(63.1% 0.08 295.3)
-
Step 600
600
#7869A0
oklch(55.7% 0.085 296.1)
-
Step 700
700
#655789
oklch(49.1% 0.08 296.2)
-
Step 800
800
#52476F
oklch(42.6% 0.066 296.1)
-
Step 900
900 (this color)
#3F3755
oklch(35.8% 0.052 295.9)
-
Step 950
950
#282335
oklch(27% 0.034 296.8)
#3F3755 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) | #303C56 | 0.027 |
| Deuteranopia (no green cones) | #313B54 | 0.025 |
| Tritanopia (no blue cones) | #3B3C42 | 0.042 |
| Achromatopsia (no color) | #3B3B3B | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3755
#3F3755
oklch(35.8% 0.052 295.9)
- #3B401F
#3B401F
oklch(35.8% 0.052 116.2)
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 #3F3755, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.053
- Gunmetal #293241 ΔE 0.054
- Space Cadet #2B2D42 ΔE 0.057
- Charcoal #264653 ΔE 0.058
Use #3F3755 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.