#4B3971
Closest named color: Dark Slate Blue (#483D8B). oklch(39.2% 0.093 296.7), rgb(75, 57, 113).
Aa
White text reads best on this color (9.89:1).
About this color
#4B3971 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.093 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.044 away. White text reads best on it, at 9.89:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.093) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.12:1 |
| White text | 9.89:1 |
Values
| HEX | #4B3971 |
| RGB | rgb(75, 57, 113) |
| HSL | hsl(259, 33%, 33%) |
| OKLCH | oklch(39.2% 0.093 296.7) |
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 #4B3971 | 9.89:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #4B3971 | 2.12:1 | Fails | Lc 11.1 | Not readable |
| #4B3971 text on white | 9.89:1 | AAA | Lc 92.8 | Preferred for body text |
| #4B3971 text on black | 2.12:1 | Fails | Lc -9.7 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F6
oklch(93.5% 0.021 298.2)
-
Step 200
200
#DBD4F0
oklch(88.4% 0.039 297)
-
Step 300
300
#C5B8E9
oklch(81% 0.07 297)
-
Step 400
400
#A891DE
oklch(70.7% 0.113 297.2)
-
Step 500
500
#9374D5
oklch(63% 0.144 296.8)
-
Step 600
600
#7E5BC2
oklch(55.6% 0.155 296.7)
-
Step 700
700
#6A4AA8
oklch(49.1% 0.145 296.3)
-
Step 800
800
#573D88
oklch(42.7% 0.121 297)
-
Step 900
900 (this color)
#4B3971
oklch(39.2% 0.093 296.7)
-
Step 950
950
#2A1F40
oklch(27% 0.061 297.6)
#4B3971 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) | #274373 | 0.057 |
| Deuteranopia (no green cones) | #2A4270 | 0.054 |
| Tritanopia (no blue cones) | #43434F | 0.074 |
| Achromatopsia (no color) | #434343 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B3971
#4B3971
oklch(39.2% 0.093 296.7)
- #434B00
#434B00
oklch(39.2% 0.09 116.5)
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 #4B3971, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.044
- Blueberry #464196 ΔE 0.063
- Twilight #4E518B ΔE 0.073
- Dusk #4E5481 ΔE 0.077
- Twilight Blue #0A437A ΔE 0.077
- Dark Grey Blue #29465B ΔE 0.078
- Cobalt #1E488F ΔE 0.079
- Rebecca Purple #663399 ΔE 0.084
Use #4B3971 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.