#4B3181
Closest named color: Dark Slate Blue (#483D8B). oklch(38.8% 0.129 294.6), rgb(75, 49, 129).
Aa
White text reads best on this color (10.21:1).
About this color
#4B3181 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.129 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.032 away. White text reads best on it, at 10.21:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.129) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.05:1 |
| White text | 10.21:1 |
Values
| HEX | #4B3181 |
| RGB | rgb(75, 49, 129) |
| HSL | hsl(260, 45%, 35%) |
| OKLCH | oklch(38.8% 0.129 294.6) |
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 #4B3181 | 10.21:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #4B3181 | 2.05:1 | Fails | Lc 10.6 | Not readable |
| #4B3181 text on white | 10.21:1 | AAA | Lc 93.4 | Preferred for body text |
| #4B3181 text on black | 2.05:1 | Fails | Lc -9.1 | 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
#F6F4FE
oklch(97.2% 0.013 295.3)
-
Step 100
100
#EBE7FB
oklch(93.7% 0.027 295)
-
Step 200
200
#DBD3FA
oklch(88.6% 0.054 294.7)
-
Step 300
300
#C4B5F9
oklch(80.9% 0.096 294.3)
-
Step 400
400
#A88BF6
oklch(70.8% 0.154 294.6)
-
Step 500
500
#9469F2
oklch(63.1% 0.197 294.5)
-
Step 600
600
#804BE1
oklch(55.6% 0.215 294.6)
-
Step 700
700
#6D3BC3
oklch(49.2% 0.199 294.8)
-
Step 800
800
#58329E
oklch(42.7% 0.166 294.5)
-
Step 900
900 (this color)
#4B3181
oklch(38.8% 0.129 294.6)
-
Step 950
950
#2A1C49
oklch(27% 0.081 294.8)
#4B3181 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) | #004284 | 0.087 |
| Deuteranopia (no green cones) | #07407F | 0.084 |
| Tritanopia (no blue cones) | #3D4354 | 0.103 |
| Achromatopsia (no color) | #414141 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B3181
#4B3181
oklch(38.8% 0.129 294.6)
- #444900
#444900
oklch(38.8% 0.087 114.2)
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 #4B3181, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.032
- Blueberry #464196 ΔE 0.050
- Rebecca Purple #663399 ΔE 0.064
- Indigo #4B0082 ΔE 0.073
- Cobalt #1E488F ΔE 0.080
- Imperial Purple #480CA8 ΔE 0.083
- Twilight #4E518B ΔE 0.085
- Royal Purple #4B006E ΔE 0.085
Use #4B3181 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.