#5B3796
Closest named color: Rebecca Purple (#663399). oklch(43.1% 0.149 297.2), rgb(91, 55, 150).
Aa
White text reads best on this color (8.63:1).
About this color
#5B3796 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.149 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.022 away. White text reads best on it, at 8.63:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.149) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.43:1 |
| White text | 8.63:1 |
Values
| HEX | #5B3796 |
| RGB | rgb(91, 55, 150) |
| HSL | hsl(263, 46%, 40%) |
| OKLCH | oklch(43.1% 0.149 297.2) |
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 #5B3796 | 8.63:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #5B3796 | 2.43:1 | Fails | Lc 14.8 | Not readable |
| #5B3796 text on white | 8.63:1 | AAA | Lc 89.2 | Fine for body text |
| #5B3796 text on black | 2.43:1 | Fails | Lc -13.0 | 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
#F6F4FD
oklch(97.1% 0.012 296.4)
-
Step 100
100
#EBE7F9
oklch(93.6% 0.024 296.1)
-
Step 200
200
#DCD3F6
oklch(88.5% 0.049 297.2)
-
Step 300
300
#C6B5F3
oklch(80.9% 0.088 297)
-
Step 400
400
#AA8CEC
oklch(70.6% 0.14 297.1)
-
Step 500
500
#976CE6
oklch(63.1% 0.178 297.3)
-
Step 600
600
#8250D4
oklch(55.5% 0.194 297.1)
-
Step 700
700
#6F40B8
oklch(49.2% 0.18 297.3)
-
Step 800
800 (this color)
#5B3796
oklch(43.1% 0.149 297.2)
-
Step 900
900
#493076
oklch(37.6% 0.115 297)
-
Step 950
950
#2B1D45
oklch(27% 0.073 297.5)
#5B3796 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) | #004C99 | 0.104 |
| Deuteranopia (no green cones) | #064B94 | 0.103 |
| Tritanopia (no blue cones) | #4D4C61 | 0.115 |
| Achromatopsia (no color) | #4C4C4C | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3796
#5B3796
oklch(43.1% 0.149 297.2)
- #4D5700
#4D5700
oklch(43.3% 0.1 117.2)
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 #5B3796, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.022
- Dark Slate Blue #483D8B ΔE 0.040
- Blueberry #464196 ΔE 0.041
- Twilight #4E518B ΔE 0.072
- Chrysanthemum #560BAD ΔE 0.073
- Blue With A Hint Of Purple #533CC6 ΔE 0.079
- Bluey Purple #6241C7 ΔE 0.082
- Imperial Purple #480CA8 ΔE 0.083
Use #5B3796 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.