#5B3087
Closest named color: Rebecca Purple (#663399). oklch(40.9% 0.141 303.5), rgb(91, 48, 135).
Aa
White text reads best on this color (9.47:1).
About this color
#5B3087 is a dark, vivid purple. In OKLCH its lightness is 41%, its chroma 0.141 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.036 away. White text reads best on it, at 9.47:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | vivid (0.141) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.21:1 |
| White text | 9.47:1 |
Values
| HEX | #5B3087 |
| RGB | rgb(91, 48, 135) |
| HSL | hsl(270, 48%, 36%) |
| OKLCH | oklch(40.9% 0.141 303.5) |
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 #5B3087 | 9.47:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #5B3087 | 2.21:1 | Fails | Lc 12.5 | Not readable |
| #5B3087 text on white | 9.47:1 | AAA | Lc 91.4 | Preferred for body text |
| #5B3087 text on black | 2.21:1 | Fails | Lc -10.9 | 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 800.
-
Step 50
50
#F7F4FC
oklch(97.2% 0.011 303.1)
-
Step 100
100
#EDE6F7
oklch(93.5% 0.024 304.5)
-
Step 200
200
#DFD2F3
oklch(88.4% 0.047 303.3)
-
Step 300
300
#CBB4ED
oklch(80.9% 0.083 303)
-
Step 400
400
#B28BE3
oklch(70.7% 0.131 303.6)
-
Step 500
500
#9F6BDB
oklch(63% 0.168 303.4)
-
Step 600
600
#8B50C9
oklch(55.7% 0.183 303.5)
-
Step 700
700
#763FAD
oklch(49% 0.17 303.7)
-
Step 800
800 (this color)
#5B3087
oklch(40.9% 0.141 303.5)
-
Step 900
900
#4E2F70
oklch(37.6% 0.11 303.6)
-
Step 950
950
#2E1C42
oklch(27% 0.071 303.9)
#5B3087 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) | #00458A | 0.113 |
| Deuteranopia (no green cones) | #174685 | 0.104 |
| Tritanopia (no blue cones) | #534257 | 0.102 |
| Achromatopsia (no color) | #464646 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3087
#5B3087
oklch(40.9% 0.141 303.5)
- #405300
#405300
oklch(41.1% 0.101 123.5)
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 #5B3087, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.036
- Dark Slate Blue #483D8B ΔE 0.044
- Blueberry #464196 ΔE 0.056
- Chrysanthemum #560BAD ΔE 0.080
- Indigo #4B0082 ΔE 0.080
- Twilight #4E518B ΔE 0.084
- Imperial Purple #480CA8 ΔE 0.087
- Purple #800080 ΔE 0.089
Use #5B3087 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.