#5B3281
Closest named color: Dark Slate Blue (#483D8B). oklch(40.8% 0.13 305.3), rgb(91, 50, 129).
Aa
White text reads best on this color (9.46:1).
About this color
#5B3281 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.130 and its hue 305°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.043 away. White text reads best on it, at 9.46:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.130) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.21:1 |
| White text | 9.46:1 |
Values
| HEX | #5B3281 |
| RGB | rgb(91, 50, 129) |
| HSL | hsl(271, 44%, 35%) |
| OKLCH | oklch(40.8% 0.13 305.3) |
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 #5B3281 | 9.46:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #5B3281 | 2.21:1 | Fails | Lc 12.4 | Not readable |
| #5B3281 text on white | 9.46:1 | AAA | Lc 91.5 | Preferred for body text |
| #5B3281 text on black | 2.21:1 | Fails | Lc -10.9 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EDE6F6
oklch(93.5% 0.023 305.6)
-
Step 200
200
#DFD3F0
oklch(88.5% 0.041 304.3)
-
Step 300
300
#CCB5E9
oklch(81% 0.076 304.9)
-
Step 400
400
#B38CDD
oklch(70.7% 0.122 305.6)
-
Step 500
500
#A06DD4
oklch(63.1% 0.156 305.2)
-
Step 600
600
#8B53C1
oklch(55.6% 0.169 305)
-
Step 700
700
#7642A6
oklch(49% 0.158 305.3)
-
Step 800
800 (this color)
#5B3281
oklch(40.8% 0.13 305.3)
-
Step 900
900
#4F316C
oklch(37.8% 0.101 305.6)
-
Step 950
950
#2E1D3F
oklch(27% 0.064 305.6)
#5B3281 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) | #0E4584 | 0.107 |
| Deuteranopia (no green cones) | #22467F | 0.095 |
| Tritanopia (no blue cones) | #544254 | 0.096 |
| Achromatopsia (no color) | #464646 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3281
#5B3281
oklch(40.8% 0.13 305.3)
- #3D5300
#3D5300
oklch(40.9% 0.103 125.3)
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 #5B3281, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.043
- Rebecca Purple #663399 ΔE 0.044
- Blueberry #464196 ΔE 0.058
- Twilight #4E518B ΔE 0.080
- Indigo #4B0082 ΔE 0.085
- Purple #800080 ΔE 0.090
- Dusk #4E5481 ΔE 0.091
- Chrysanthemum #560BAD ΔE 0.091
Use #5B3281 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.