#5B4181
Closest named color: Dark Slate Blue (#483D8B). oklch(43.4% 0.105 300.9), rgb(91, 65, 129).
Aa
White text reads best on this color (8.34:1).
About this color
#5B4181 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.105 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.041 away. White text reads best on it, at 8.34:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.51:1 |
| White text | 8.34:1 |
Values
| HEX | #5B4181 |
| RGB | rgb(91, 65, 129) |
| HSL | hsl(264, 33%, 38%) |
| OKLCH | oklch(43.4% 0.105 300.9) |
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 #5B4181 | 8.34:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #5B4181 | 2.51:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #5B4181 text on white | 8.34:1 | AAA | Lc 88.6 | Fine for body text |
| #5B4181 text on black | 2.51:1 | Fails | Lc -13.6 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#ECE7F4
oklch(93.6% 0.018 303.4)
-
Step 200
200
#DDD4ED
oklch(88.5% 0.035 302)
-
Step 300
300
#C7B8E3
oklch(80.9% 0.062 301)
-
Step 400
400
#AB92D5
oklch(70.7% 0.099 301)
-
Step 500
500
#9676C9
oklch(63% 0.125 300.6)
-
Step 600
600
#815DB6
oklch(55.5% 0.137 300.7)
-
Step 700
700
#6D4C9D
oklch(49% 0.128 300.6)
-
Step 800
800 (this color)
#5B4181
oklch(43.4% 0.105 300.9)
-
Step 900
900
#493666
oklch(37.7% 0.082 300.8)
-
Step 950
950
#2B203C
oklch(27.1% 0.052 301.1)
#5B4181 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) | #2D4E83 | 0.072 |
| Deuteranopia (no green cones) | #344E7F | 0.066 |
| Tritanopia (no blue cones) | #544D5B | 0.081 |
| Achromatopsia (no color) | #4E4E4E | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B4181
#5B4181
oklch(43.4% 0.105 300.9)
- #495900
#495900
oklch(43.5% 0.104 121)
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 #5B4181, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.041
- Twilight #4E518B ΔE 0.046
- Blueberry #464196 ΔE 0.050
- Dusk #4E5481 ΔE 0.055
- Rebecca Purple #663399 ΔE 0.056
- Dusty Grape #545775 ΔE 0.070
- Denim Blue #3B5B92 ΔE 0.080
- Dusk Blue #26538D ΔE 0.082
Use #5B4181 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.