#3F3549
Closest named color: Onyx (#343A40). oklch(34.8% 0.037 307.3), rgb(63, 53, 73).
Aa
White text reads best on this color (11.55:1).
About this color
#3F3549 is a dark, muted purple. In OKLCH its lightness is 35%, its chroma 0.037 and its hue 307°. 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 11.55:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | muted (0.037) |
| Temperature | in between |
| Nearest name | Onyx (#343A40) |
| Black text | 1.81:1 |
| White text | 11.55:1 |
Values
| HEX | #3F3549 |
| RGB | rgb(63, 53, 73) |
| HSL | hsl(270, 16%, 25%) |
| OKLCH | oklch(34.8% 0.037 307.3) |
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 #3F3549 | 11.55:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #3F3549 | 1.81:1 | Fails | Lc 0.0 | Not readable |
| #3F3549 text on white | 11.55:1 | AAA | Lc 96.6 | Preferred for body text |
| #3F3549 text on black | 1.81:1 | 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
#EBE8EE
oklch(93.5% 0.009 308.4)
-
Step 200
200
#DCD7E1
oklch(88.6% 0.015 308.3)
-
Step 300
300
#C5BCCF
oklch(80.8% 0.028 307)
-
Step 400
400
#A89AB6
oklch(70.7% 0.043 307.8)
-
Step 500
500
#9281A4
oklch(63.1% 0.055 306.9)
-
Step 600
600
#7D6A8F
oklch(55.6% 0.06 307.8)
-
Step 700
700
#69587A
oklch(49% 0.057 307.2)
-
Step 800
800
#564863
oklch(42.7% 0.047 308)
-
Step 900
900 (this color)
#3F3549
oklch(34.8% 0.037 307.3)
-
Step 950
950
#29242F
oklch(27.1% 0.021 305.6)
#3F3549 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) | #32394A | 0.024 |
| Deuteranopia (no green cones) | #333948 | 0.023 |
| Tritanopia (no blue cones) | #3E383C | 0.028 |
| Achromatopsia (no color) | #393939 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3549
#3F3549
oklch(34.8% 0.037 307.3)
- #353E29
#353E29
oklch(34.9% 0.037 127.1)
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 #3F3549, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.032
- Gunmetal #293241 ΔE 0.042
- Charcoal Grey #3C4142 ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.059
- Charcoal #264653 ΔE 0.059
Use #3F3549 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.