#5B3899
Closest named color: Rebecca Purple (#663399). oklch(43.5% 0.151 296.1), rgb(91, 56, 153).
Aa
White text reads best on this color (8.50:1).
About this color
#5B3899 is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.151 and its hue 296°. 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 8.50:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.151) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.47:1 |
| White text | 8.50:1 |
Values
| HEX | #5B3899 |
| RGB | rgb(91, 56, 153) |
| HSL | hsl(262, 46%, 41%) |
| OKLCH | oklch(43.5% 0.151 296.1) |
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 #5B3899 | 8.50:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #5B3899 | 2.47:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #5B3899 text on white | 8.50:1 | AAA | Lc 88.8 | Fine for body text |
| #5B3899 text on black | 2.47:1 | Fails | Lc -13.4 | 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
#EBE7FA
oklch(93.7% 0.026 295.5)
-
Step 200
200
#DBD3F7
oklch(88.5% 0.05 295.5)
-
Step 300
300
#C5B5F4
oklch(80.8% 0.089 296)
-
Step 400
400
#A98CEE
oklch(70.6% 0.142 296.2)
-
Step 500
500
#956CE8
oklch(63% 0.181 296.1)
-
Step 600
600
#8150D6
oklch(55.5% 0.196 296.2)
-
Step 700
700
#6D40BA
oklch(49.1% 0.182 295.9)
-
Step 800
800 (this color)
#5B3899
oklch(43.5% 0.151 296.1)
-
Step 900
900
#493078
oklch(37.8% 0.118 296.3)
-
Step 950
950
#2A1D46
oklch(27% 0.074 295.6)
#5B3899 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) | #004D9C | 0.103 |
| Deuteranopia (no green cones) | #004B97 | 0.103 |
| Tritanopia (no blue cones) | #4C4E63 | 0.118 |
| Achromatopsia (no color) | #4D4D4D | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3899
#5B3899
oklch(43.5% 0.151 296.1)
- #4F5700
#4F5700
oklch(43.5% 0.099 115.8)
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 #5B3899, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.022
- Blueberry #464196 ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.041
- Twilight #4E518B ΔE 0.071
- Chrysanthemum #560BAD ΔE 0.072
- Blue With A Hint Of Purple #533CC6 ΔE 0.074
- Bluey Purple #6241C7 ΔE 0.077
- Grape #7209B7 ΔE 0.082
Use #5B3899 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.