#3F316C
Closest named color: Dark Slate Blue (#483D8B). oklch(36% 0.099 291.6), rgb(63, 49, 108).
Aa
White text reads best on this color (11.24:1).
About this color
#3F316C is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.099 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.061 away. White text reads best on it, at 11.24:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.099) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.86:1 |
| White text | 11.24:1 |
Values
| HEX | #3F316C |
| RGB | rgb(63, 49, 108) |
| HSL | hsl(254, 38%, 31%) |
| OKLCH | oklch(36% 0.099 291.6) |
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 #3F316C | 11.24:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #3F316C | 1.86:1 | Fails | Lc 8.1 | Not readable |
| #3F316C text on white | 11.24:1 | AAA | Lc 95.8 | Preferred for body text |
| #3F316C text on black | 1.86:1 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE8F7
oklch(93.7% 0.02 292.1)
-
Step 200
200
#D9D5F3
oklch(88.5% 0.041 291.7)
-
Step 300
300
#C1B9ED
oklch(81% 0.073 291.7)
-
Step 400
400
#A293E4
oklch(70.8% 0.117 291.6)
-
Step 500
500
#8C75DD
oklch(63% 0.153 291.6)
-
Step 600
600
#775CCA
oklch(55.6% 0.164 291.5)
-
Step 700
700
#644BAF
oklch(49.1% 0.153 291.3)
-
Step 800
800
#523E8D
oklch(42.7% 0.126 291.9)
-
Step 900
900 (this color)
#3F316C
oklch(36% 0.099 291.6)
-
Step 950
950
#272042
oklch(27% 0.062 291.2)
#3F316C 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) | #183C6E | 0.057 |
| Deuteranopia (no green cones) | #1A3A6B | 0.055 |
| Tritanopia (no blue cones) | #333D49 | 0.081 |
| Achromatopsia (no color) | #3B3B3B | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F316C
#3F316C
oklch(36% 0.099 291.6)
- #3F4100
#3F4100
oklch(36.1% 0.08 111.7)
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 #3F316C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.066
- Marine Blue #01386A ΔE 0.070
- Twilight Blue #0A437A ΔE 0.072
- Blueberry #464196 ΔE 0.080
- Dark Grey Blue #29465B ΔE 0.080
- Marine #042E60 ΔE 0.081
- Dark Blue Grey #1F3B4D ΔE 0.083
Use #3F316C 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.