#5B43A4
Closest named color: Rebecca Purple (#663399). oklch(46.1% 0.15 290.7), rgb(91, 67, 164).
Aa
White text reads best on this color (7.54:1).
About this color
#5B43A4 is a medium-dark, vivid purple. In OKLCH its lightness is 46%, its chroma 0.150 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.041 away. White text reads best on it, at 7.54:1.
| Hue family | Purples |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.150) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.78:1 |
| White text | 7.54:1 |
Values
| HEX | #5B43A4 |
| RGB | rgb(91, 67, 164) |
| HSL | hsl(255, 42%, 45%) |
| OKLCH | oklch(46.1% 0.15 290.7) |
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 #5B43A4 | 7.54:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #5B43A4 | 2.78:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #5B43A4 text on white | 7.54:1 | AAA | Lc 85.9 | Fine for body text |
| #5B43A4 text on black | 2.78:1 | Fails | Lc -16.2 | Dividers and decoration only |
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 700.
-
Step 50
50
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F7
oklch(93.6% 0.02 289.1)
-
Step 200
200
#D8D5F2
oklch(88.4% 0.04 290.3)
-
Step 300
300
#C0B9ED
oklch(80.9% 0.073 290.8)
-
Step 400
400
#A193E3
oklch(70.7% 0.116 291.2)
-
Step 500
500
#8B76DB
oklch(63% 0.148 291.1)
-
Step 600
600
#765DC9
oklch(55.6% 0.161 290.9)
-
Step 700
700 (this color)
#5B43A4
oklch(46.1% 0.15 290.7)
-
Step 800
800
#513F8D
oklch(42.8% 0.124 290.8)
-
Step 900
900
#423670
oklch(37.6% 0.096 290.5)
-
Step 950
950
#272042
oklch(27% 0.062 291.2)
#5B43A4 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) | #0056A7 | 0.093 |
| Deuteranopia (no green cones) | #0752A2 | 0.090 |
| Tritanopia (no blue cones) | #46596D | 0.122 |
| Achromatopsia (no color) | #545454 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B43A4
#5B43A4
oklch(46.1% 0.15 290.7)
- #5C5D00
#5C5D00
oklch(46.2% 0.101 110.5)
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 #5B43A4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.041
- Blueberry #464196 ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.054
- Bluey Purple #6241C7 ΔE 0.057
- Blue With A Hint Of Purple #533CC6 ΔE 0.059
- Twilight #4E518B ΔE 0.061
- Blurple #5539CC ΔE 0.068
- Iris #6258C4 ΔE 0.070
Use #5B43A4 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.