#5B317B
Closest named color: Dark Slate Blue (#483D8B). oklch(40.3% 0.125 308), rgb(91, 49, 123).
Aa
White text reads best on this color (9.67:1).
About this color
#5B317B is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.125 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.049 away. White text reads best on it, at 9.67:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.125) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.17:1 |
| White text | 9.67:1 |
Values
| HEX | #5B317B |
| RGB | rgb(91, 49, 123) |
| HSL | hsl(274, 43%, 34%) |
| OKLCH | oklch(40.3% 0.125 308) |
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 #5B317B | 9.67:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #5B317B | 2.17:1 | Fails | Lc 11.9 | Not readable |
| #5B317B text on white | 9.67:1 | AAA | Lc 92.1 | Preferred for body text |
| #5B317B text on black | 2.17:1 | Fails | Lc -10.4 | 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
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EEE6F5
oklch(93.6% 0.022 309.6)
-
Step 200
200
#E0D3EE
oklch(88.6% 0.039 307.2)
-
Step 300
300
#CEB5E5
oklch(81% 0.072 308.4)
-
Step 400
400
#B58CD9
oklch(70.7% 0.118 308.1)
-
Step 500
500
#A26ECE
oklch(63.1% 0.148 307.7)
-
Step 600
600
#8E53BB
oklch(55.6% 0.163 308.2)
-
Step 700
700
#7843A1
oklch(49% 0.151 307.8)
-
Step 800
800 (this color)
#5B317B
oklch(40.3% 0.125 308)
-
Step 900
900
#503169
oklch(37.7% 0.098 307.9)
-
Step 950
950
#2F1D3D
oklch(27% 0.062 308.8)
#5B317B 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) | #15437D | 0.105 |
| Deuteranopia (no green cones) | #264579 | 0.093 |
| Tritanopia (no blue cones) | #563F51 | 0.089 |
| Achromatopsia (no color) | #444444 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B317B
#5B317B
oklch(40.3% 0.125 308)
- #385200
#385200
oklch(40.2% 0.105 127.6)
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 #5B317B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.049
- Rebecca Purple #663399 ΔE 0.053
- Blueberry #464196 ΔE 0.065
- Twilight #4E518B ΔE 0.084
- Indigo #4B0082 ΔE 0.085
- Grape Purple #5D1451 ΔE 0.086
- Purple #800080 ΔE 0.090
- Royal Purple #4B006E ΔE 0.091
Use #5B317B 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.