#4B3173
Closest named color: Dark Slate Blue (#483D8B). oklch(37.8% 0.11 299.3), rgb(75, 49, 115).
Aa
White text reads best on this color (10.57:1).
About this color
#4B3173 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.110 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.048 away. White text reads best on it, at 10.57:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.110) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.98:1 |
| White text | 10.57:1 |
Values
| HEX | #4B3173 |
| RGB | rgb(75, 49, 115) |
| HSL | hsl(264, 40%, 32%) |
| OKLCH | oklch(37.8% 0.11 299.3) |
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 #4B3173 | 10.57:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #4B3173 | 1.98:1 | Fails | Lc 9.6 | Not readable |
| #4B3173 text on white | 10.57:1 | AAA | Lc 94.3 | Preferred for body text |
| #4B3173 text on black | 1.98:1 | Fails | Lc -8.3 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#ECE7F8
oklch(93.7% 0.023 299.4)
-
Step 200
200
#DDD3F4
oklch(88.5% 0.046 299.3)
-
Step 300
300
#C8B5EF
oklch(80.9% 0.083 299.6)
-
Step 400
400
#AD8DE7
oklch(70.8% 0.132 299.4)
-
Step 500
500
#996DDF
oklch(63% 0.169 299.3)
-
Step 600
600
#8552CD
oklch(55.6% 0.183 299.5)
-
Step 700
700
#7042B1
oklch(49.1% 0.169 299.1)
-
Step 800
800
#5B3790
oklch(42.7% 0.141 298.9)
-
Step 900
900 (this color)
#4B3173
oklch(37.8% 0.11 299.3)
-
Step 950
950
#2C1D43
oklch(27% 0.07 300)
#4B3173 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) | #163F75 | 0.078 |
| Deuteranopia (no green cones) | #1E3E71 | 0.072 |
| Tritanopia (no blue cones) | #433E4D | 0.084 |
| Achromatopsia (no color) | #3F3F3F | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B3173
#4B3173
oklch(37.8% 0.11 299.3)
- #3D4800
#3D4800
oklch(37.8% 0.089 119.1)
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 #4B3173, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.048
- Blueberry #464196 ΔE 0.067
- Indigo #4B0082 ΔE 0.080
- Rebecca Purple #663399 ΔE 0.081
- Royal Purple #4B006E ΔE 0.082
- Grape Purple #5D1451 ΔE 0.084
- Twilight Blue #0A437A ΔE 0.086
- Cobalt #1E488F ΔE 0.088
Use #4B3173 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.