#4B288B
Closest named color: Dark Slate Blue (#483D8B). oklch(38.3% 0.154 294.1), rgb(75, 40, 139).
Aa
White text reads best on this color (10.63:1).
About this color
#4B288B is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.154 and its hue 294°. 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 10.63:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.154) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.97:1 |
| White text | 10.63:1 |
Values
| HEX | #4B288B |
| RGB | rgb(75, 40, 139) |
| HSL | hsl(261, 55%, 35%) |
| OKLCH | oklch(38.3% 0.154 294.1) |
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 #4B288B | 10.63:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #4B288B | 1.97:1 | Fails | Lc 9.9 | Not readable |
| #4B288B text on white | 10.63:1 | AAA | Lc 94.0 | Preferred for body text |
| #4B288B text on black | 1.97:1 | Fails | Lc -8.5 | 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
#F6F4FF
oklch(97.2% 0.015 294.5)
-
Step 100
100
#EBE6FF
oklch(93.6% 0.034 294.9)
-
Step 200
200
#DBD2FF
oklch(88.5% 0.062 294.3)
-
Step 300
300
#C4B3FF
oklch(80.8% 0.107 294.1)
-
Step 400
400
#A888FF
oklch(70.7% 0.17 294)
-
Step 500
500
#9562FF
oklch(63% 0.222 294)
-
Step 600
600
#8339F6
oklch(55.5% 0.257 294)
-
Step 700
700
#7028D7
oklch(49.2% 0.239 294.1)
-
Step 800
800
#5A25AD
oklch(42.6% 0.197 293.9)
-
Step 900
900 (this color)
#4B288B
oklch(38.3% 0.154 294.1)
-
Step 950
950
#2B1850
oklch(27% 0.098 294.6)
#4B288B 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) | #003F8E | 0.093 |
| Deuteranopia (no green cones) | #003D89 | 0.092 |
| Tritanopia (no blue cones) | #394156 | 0.122 |
| Achromatopsia (no color) | #3E3E3E | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B288B
#4B288B
oklch(38.3% 0.154 294.1)
- #434800
#434800
oklch(38.4% 0.086 114.2)
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 #4B288B, 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
- Indigo #4B0082 ΔE 0.055
- Imperial Purple #480CA8 ΔE 0.058
- Blueberry #464196 ΔE 0.059
- Rebecca Purple #663399 ΔE 0.063
- Chrysanthemum #560BAD ΔE 0.064
- Indigo Blue #3A18B1 ΔE 0.076
- Royal Purple #4B006E ΔE 0.077
Use #4B288B 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.