#5B307D
Closest named color: Dark Slate Blue (#483D8B). oklch(40.2% 0.129 307.3), rgb(91, 48, 125).
Aa
White text reads best on this color (9.70:1).
About this color
#5B307D is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.129 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.048 away. White text reads best on it, at 9.70:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.129) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.16:1 |
| White text | 9.70:1 |
Values
| HEX | #5B307D |
| RGB | rgb(91, 48, 125) |
| HSL | hsl(274, 45%, 34%) |
| OKLCH | oklch(40.2% 0.129 307.3) |
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 #5B307D | 9.70:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #5B307D | 2.16:1 | Fails | Lc 11.9 | Not readable |
| #5B307D text on white | 9.70:1 | AAA | Lc 92.1 | Preferred for body text |
| #5B307D text on black | 2.16:1 | Fails | Lc -10.3 | 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
#EEE6F6
oklch(93.6% 0.023 308.2)
-
Step 200
200
#E0D2EF
oklch(88.4% 0.042 307.2)
-
Step 300
300
#CDB4E7
oklch(80.8% 0.075 307)
-
Step 400
400
#B58CDB
oklch(70.8% 0.12 307.4)
-
Step 500
500
#A26DD1
oklch(63.1% 0.153 307)
-
Step 600
600
#8E52BE
oklch(55.6% 0.168 307.5)
-
Step 700
700
#7842A4
oklch(49.1% 0.156 307)
-
Step 800
800 (this color)
#5B307D
oklch(40.2% 0.129 307.3)
-
Step 900
900
#50316A
oklch(37.8% 0.099 307.4)
-
Step 950
950
#2F1D3E
oklch(27% 0.063 307.9)
#5B307D 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) | #10437F | 0.108 |
| Deuteranopia (no green cones) | #23457B | 0.097 |
| Tritanopia (no blue cones) | #563F51 | 0.093 |
| Achromatopsia (no color) | #444444 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B307D
#5B307D
oklch(40.2% 0.129 307.3)
- #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 #5B307D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.048
- Rebecca Purple #663399 ΔE 0.050
- Blueberry #464196 ΔE 0.064
- Indigo #4B0082 ΔE 0.082
- Twilight #4E518B ΔE 0.085
- Grape Purple #5D1451 ΔE 0.087
- Purple #800080 ΔE 0.089
- Royal Purple #4B006E ΔE 0.090
Use #5B307D 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.