#5B3A99
Closest named color: Rebecca Purple (#663399). oklch(43.8% 0.148 295.6), rgb(91, 58, 153).
Aa
White text reads best on this color (8.36:1).
About this color
#5B3A99 is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.148 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 0.024 away. White text reads best on it, at 8.36:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.51:1 |
| White text | 8.36:1 |
Values
| HEX | #5B3A99 |
| RGB | rgb(91, 58, 153) |
| HSL | hsl(261, 45%, 41%) |
| OKLCH | oklch(43.8% 0.148 295.6) |
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 #5B3A99 | 8.36:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #5B3A99 | 2.51:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #5B3A99 text on white | 8.36:1 | AAA | Lc 88.5 | Fine for body text |
| #5B3A99 text on black | 2.51:1 | Fails | Lc -13.7 | 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
#DBD3F6
oklch(88.4% 0.048 295.9)
-
Step 300
300
#C5B6F3
oklch(81% 0.086 295.7)
-
Step 400
400
#A88DED
oklch(70.7% 0.139 295.6)
-
Step 500
500
#946DE7
oklch(63% 0.178 295.6)
-
Step 600
600
#8052D5
oklch(55.7% 0.192 295.7)
-
Step 700
700
#6C41B9
oklch(49.1% 0.18 295.5)
-
Step 800
800 (this color)
#5B3A99
oklch(43.8% 0.148 295.6)
-
Step 900
900
#483177
oklch(37.8% 0.115 295.5)
-
Step 950
950
#2A1D46
oklch(27% 0.074 295.6)
#5B3A99 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) | #004E9C | 0.101 |
| Deuteranopia (no green cones) | #074C97 | 0.099 |
| Tritanopia (no blue cones) | #4B4F64 | 0.116 |
| Achromatopsia (no color) | #4E4E4E | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3A99
#5B3A99
oklch(43.8% 0.148 295.6)
- #505800
#505800
oklch(43.8% 0.1 115.7)
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 #5B3A99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.024
- Blueberry #464196 ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.041
- Twilight #4E518B ΔE 0.067
- Blue With A Hint Of Purple #533CC6 ΔE 0.074
- Bluey Purple #6241C7 ΔE 0.076
- Chrysanthemum #560BAD ΔE 0.076
- Blurple #5539CC ΔE 0.083
Use #5B3A99 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.