#4F3989
Closest named color: Dark Slate Blue (#483D8B). oklch(41.2% 0.128 292.6), rgb(79, 57, 137).
Aa
White text reads best on this color (9.21:1).
About this color
#4F3989 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.128 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.015 away. White text reads best on it, at 9.21:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.128) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.27:1 |
| White text | 9.21:1 |
Values
| HEX | #4F3989 |
| RGB | rgb(79, 57, 137) |
| HSL | hsl(257, 41%, 38%) |
| OKLCH | oklch(41.2% 0.128 292.6) |
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 #4F3989 | 9.21:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #4F3989 | 2.27:1 | Fails | Lc 13.0 | Not readable |
| #4F3989 text on white | 9.21:1 | AAA | Lc 91.0 | Preferred for body text |
| #4F3989 text on black | 2.27:1 | Fails | Lc -11.4 | 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 800.
-
Step 50
50
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE8F8
oklch(93.7% 0.022 291.7)
-
Step 200
200
#D9D5F3
oklch(88.5% 0.041 291.7)
-
Step 300
300
#C1B8ED
oklch(80.8% 0.075 292.4)
-
Step 400
400
#A392E5
oklch(70.7% 0.12 292.5)
-
Step 500
500
#8E75DD
oklch(63.2% 0.153 292.6)
-
Step 600
600
#795BCA
oklch(55.6% 0.165 292.7)
-
Step 700
700
#664AAF
oklch(49.2% 0.154 292.6)
-
Step 800
800 (this color)
#4F3989
oklch(41.2% 0.128 292.6)
-
Step 900
900
#443571
oklch(37.7% 0.1 292.5)
-
Step 950
950
#282042
oklch(27.1% 0.062 292.6)
#4F3989 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) | #0C498C | 0.081 |
| Deuteranopia (no green cones) | #144687 | 0.077 |
| Tritanopia (no blue cones) | #3F4A5B | 0.103 |
| Achromatopsia (no color) | #484848 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F3989
#4F3989
oklch(41.2% 0.128 292.6)
- #4C4F00
#4C4F00
oklch(41.1% 0.091 112.3)
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 #4F3989, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.015
- Blueberry #464196 ΔE 0.030
- Rebecca Purple #663399 ΔE 0.051
- Twilight #4E518B ΔE 0.063
- Cobalt #1E488F ΔE 0.071
- Dusk #4E5481 ΔE 0.077
- Dusk Blue #26538D ΔE 0.082
- Sapphire #2138AB ΔE 0.087
Use #4F3989 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.