#5B318A
Closest named color: Rebecca Purple (#663399). oklch(41.3% 0.143 302.2), rgb(91, 49, 138).
Aa
White text reads best on this color (9.32:1).
About this color
#5B318A is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.143 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.032 away. White text reads best on it, at 9.32:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.143) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.25:1 |
| White text | 9.32:1 |
Values
| HEX | #5B318A |
| RGB | rgb(91, 49, 138) |
| HSL | hsl(268, 48%, 37%) |
| OKLCH | oklch(41.3% 0.143 302.2) |
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 #5B318A | 9.32:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #5B318A | 2.25:1 | Fails | Lc 12.9 | Not readable |
| #5B318A text on white | 9.32:1 | AAA | Lc 91.1 | Preferred for body text |
| #5B318A text on black | 2.25:1 | Fails | Lc -11.3 | 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
#F7F4FC
oklch(97.2% 0.011 303.1)
-
Step 100
100
#EDE6F8
oklch(93.6% 0.025 303.5)
-
Step 200
200
#DFD2F3
oklch(88.4% 0.047 303.3)
-
Step 300
300
#CBB4EE
oklch(80.9% 0.084 302.7)
-
Step 400
400
#B18BE5
oklch(70.7% 0.133 302.6)
-
Step 500
500
#9E6BDE
oklch(63.1% 0.171 302.2)
-
Step 600
600
#894FCB
oklch(55.5% 0.186 302.2)
-
Step 700
700
#753FB0
oklch(49.1% 0.173 302.4)
-
Step 800
800 (this color)
#5B318A
oklch(41.3% 0.143 302.2)
-
Step 900
900
#4D2F72
oklch(37.6% 0.112 301.9)
-
Step 950
950
#2D1C43
oklch(26.9% 0.072 301.9)
#5B318A 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) | #00468D | 0.111 |
| Deuteranopia (no green cones) | #144688 | 0.104 |
| Tritanopia (no blue cones) | #524459 | 0.105 |
| Achromatopsia (no color) | #474747 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B318A
#5B318A
oklch(41.3% 0.143 302.2)
- #425300
#425300
oklch(41.3% 0.1 122.2)
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 #5B318A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.032
- Dark Slate Blue #483D8B ΔE 0.042
- Blueberry #464196 ΔE 0.052
- Chrysanthemum #560BAD ΔE 0.077
- Twilight #4E518B ΔE 0.081
- Indigo #4B0082 ΔE 0.083
- Imperial Purple #480CA8 ΔE 0.084
- Purple #800080 ΔE 0.091
Use #5B318A 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.