#3F334E
Closest named color: Onyx (#343A40). oklch(34.6% 0.049 304.3), rgb(63, 51, 78).
Aa
White text reads best on this color (11.69:1).
About this color
#3F334E is a dark, muted purple. In OKLCH its lightness is 35%, its chroma 0.049 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.043 away. White text reads best on it, at 11.69:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | muted (0.049) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.79:1 |
| White text | 11.69:1 |
Values
| HEX | #3F334E |
| RGB | rgb(63, 51, 78) |
| HSL | hsl(267, 21%, 25%) |
| OKLCH | oklch(34.6% 0.049 304.3) |
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 #3F334E | 11.69:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #3F334E | 1.79:1 | Fails | Lc 0.0 | Not readable |
| #3F334E text on white | 11.69:1 | AAA | Lc 96.9 | Preferred for body text |
| #3F334E text on black | 1.79:1 | 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
#EBE8F0
oklch(93.6% 0.011 303.1)
-
Step 200
200
#DCD6E4
oklch(88.5% 0.02 305.2)
-
Step 300
300
#C6BBD4
oklch(80.9% 0.037 305.4)
-
Step 400
400
#A898BF
oklch(70.7% 0.059 303.6)
-
Step 500
500
#937EAE
oklch(63% 0.074 304.3)
-
Step 600
600
#7E679A
oklch(55.6% 0.081 304.6)
-
Step 700
700
#6A5683
oklch(49.1% 0.074 304.2)
-
Step 800
800
#57466B
oklch(42.7% 0.063 304.9)
-
Step 900
900 (this color)
#3F334E
oklch(34.6% 0.049 304.3)
-
Step 950
950
#2A2333
oklch(27.1% 0.031 304.4)
#3F334E 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) | #2E384F | 0.031 |
| Deuteranopia (no green cones) | #30384D | 0.029 |
| Tritanopia (no blue cones) | #3D373D | 0.037 |
| Achromatopsia (no color) | #383838 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F334E
#3F334E
oklch(34.6% 0.049 304.3)
- #343E21
#343E21
oklch(34.6% 0.049 124.4)
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 #3F334E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.043
- Gunmetal #293241 ΔE 0.046
- Space Cadet #2B2D42 ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.053
- Charcoal Grey #3C4142 ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.062
- Charcoal #264653 ΔE 0.065
Use #3F334E 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.