#4F3581
Closest named color: Dark Slate Blue (#483D8B). oklch(39.9% 0.123 296.1), rgb(79, 53, 129).
Aa
White text reads best on this color (9.72:1).
About this color
#4F3581 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.123 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.026 away. White text reads best on it, at 9.72:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.123) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.72:1 |
Values
| HEX | #4F3581 |
| RGB | rgb(79, 53, 129) |
| HSL | hsl(261, 42%, 36%) |
| OKLCH | oklch(39.9% 0.123 296.1) |
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 #4F3581 | 9.72:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #4F3581 | 2.15:1 | Fails | Lc 11.7 | Not readable |
| #4F3581 text on white | 9.72:1 | AAA | Lc 92.3 | Preferred for body text |
| #4F3581 text on black | 2.15:1 | Fails | Lc -10.2 | 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
#F6F4FD
oklch(97.1% 0.012 296.4)
-
Step 100
100
#EBE7FA
oklch(93.7% 0.026 295.5)
-
Step 200
200
#DCD3F8
oklch(88.6% 0.051 296.5)
-
Step 300
300
#C6B5F6
oklch(81% 0.092 296.3)
-
Step 400
400
#AA8BF1
oklch(70.7% 0.148 296.4)
-
Step 500
500
#966AEC
oklch(63% 0.189 296.2)
-
Step 600
600
#824DDB
oklch(55.6% 0.206 296.2)
-
Step 700
700
#6E3DBE
oklch(49.1% 0.191 296)
-
Step 800
800
#593499
oklch(42.7% 0.157 295.9)
-
Step 900
900 (this color)
#4F3581
oklch(39.9% 0.123 296.1)
-
Step 950
950
#2B1C47
oklch(27% 0.078 297)
#4F3581 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) | #0E4584 | 0.085 |
| Deuteranopia (no green cones) | #18437F | 0.079 |
| Tritanopia (no blue cones) | #434555 | 0.098 |
| Achromatopsia (no color) | #444444 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F3581
#4F3581
oklch(39.9% 0.123 296.1)
- #454D00
#454D00
oklch(39.9% 0.092 116.4)
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 #4F3581, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.026
- Blueberry #464196 ΔE 0.045
- Rebecca Purple #663399 ΔE 0.058
- Twilight #4E518B ΔE 0.074
- Cobalt #1E488F ΔE 0.078
- Indigo #4B0082 ΔE 0.084
- Dusk #4E5481 ΔE 0.085
- Twilight Blue #0A437A ΔE 0.089
Use #4F3581 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.