#5B2789
Closest named color: Rebecca Purple (#663399). oklch(39.9% 0.156 304.5), rgb(91, 39, 137).
Aa
White text reads best on this color (10.01:1).
About this color
#5B2789 is a dark, vivid purple. In OKLCH its lightness is 40%, its chroma 0.156 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.042 away. White text reads best on it, at 10.01:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | vivid (0.156) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.09:1 |
| White text | 10.01:1 |
Values
| HEX | #5B2789 |
| RGB | rgb(91, 39, 137) |
| HSL | hsl(272, 56%, 35%) |
| OKLCH | oklch(39.9% 0.156 304.5) |
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 #5B2789 | 10.01:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #5B2789 | 2.09:1 | Fails | Lc 11.4 | Not readable |
| #5B2789 text on white | 10.01:1 | AAA | Lc 92.6 | Preferred for body text |
| #5B2789 text on black | 2.09:1 | Fails | Lc -9.9 | 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 900.
-
Step 50
50
#F8F3FE
oklch(97.1% 0.015 306.4)
-
Step 100
100
#EFE5FD
oklch(93.7% 0.034 304.5)
-
Step 200
200
#E2CFFD
oklch(88.5% 0.066 303.9)
-
Step 300
300
#D1ADFE
oklch(80.8% 0.118 304.3)
-
Step 400
400
#BB7DFD
oklch(70.6% 0.187 304.4)
-
Step 500
500
#AB53FB
oklch(63.1% 0.24 304.3)
-
Step 600
600
#972BEA
oklch(55.6% 0.26 304.2)
-
Step 700
700
#8118CB
oklch(49.1% 0.241 304.3)
-
Step 800
800
#691AA4
oklch(42.7% 0.2 304.5)
-
Step 900
900 (this color)
#5B2789
oklch(39.9% 0.156 304.5)
-
Step 950
950
#32154C
oklch(27.1% 0.098 304.9)
#5B2789 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) | #00418C | 0.120 |
| Deuteranopia (no green cones) | #004287 | 0.121 |
| Tritanopia (no blue cones) | #523E55 | 0.113 |
| Achromatopsia (no color) | #424242 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B2789
#5B2789
oklch(39.9% 0.156 304.5)
- #3C5000
#3C5000
oklch(40% 0.1 124.5)
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 #5B2789, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.057
- Indigo #4B0082 ΔE 0.065
- Blueberry #464196 ΔE 0.068
- Chrysanthemum #560BAD ΔE 0.068
- Imperial Purple #480CA8 ΔE 0.075
- Royal Purple #4B006E ΔE 0.081
- Purple #800080 ΔE 0.084
Use #5B2789 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.