#573E9B
Closest named color: Blueberry (#464196). oklch(44.2% 0.145 291.8), rgb(87, 62, 155).
Aa
White text reads best on this color (8.17:1).
About this color
#573E9B is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.145 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.030 away. White text reads best on it, at 8.17:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.145) |
| Temperature | in between |
| Nearest name | Blueberry (#464196) |
| Black text | 2.56:1 |
| White text | 8.17:1 |
Values
| HEX | #573E9B |
| RGB | rgb(87, 62, 155) |
| HSL | hsl(256, 43%, 43%) |
| OKLCH | oklch(44.2% 0.145 291.8) |
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 #573E9B | 8.17:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #573E9B | 2.56:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #573E9B text on white | 8.17:1 | AAA | Lc 87.9 | Fine for body text |
| #573E9B text on black | 2.56:1 | Fails | Lc -14.2 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#EAE7F9
oklch(93.6% 0.024 293.6)
-
Step 200
200
#D9D4F7
oklch(88.5% 0.048 291.9)
-
Step 300
300
#C1B7F4
oklch(80.9% 0.086 291.9)
-
Step 400
400
#A390EE
oklch(70.8% 0.135 291.9)
-
Step 500
500
#8D71E8
oklch(63.1% 0.173 291.5)
-
Step 600
600
#7956D6
oklch(55.7% 0.188 291.7)
-
Step 700
700
#6645BA
oklch(49.2% 0.175 291.6)
-
Step 800
800 (this color)
#573E9B
oklch(44.2% 0.145 291.8)
-
Step 900
900
#443378
oklch(37.8% 0.113 291.4)
-
Step 950
950
#281E46
oklch(27% 0.072 292.4)
#573E9B 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) | #00519E | 0.092 |
| Deuteranopia (no green cones) | #064D99 | 0.090 |
| Tritanopia (no blue cones) | #445366 | 0.118 |
| Achromatopsia (no color) | #4F4F4F | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573E9B
#573E9B
oklch(44.2% 0.145 291.8)
- #555800
#555800
oklch(44.3% 0.098 112.1)
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 #573E9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.030
- Rebecca Purple #663399 ΔE 0.034
- Dark Slate Blue #483D8B ΔE 0.037
- Twilight #4E518B ΔE 0.060
- Blue With A Hint Of Purple #533CC6 ΔE 0.069
- Bluey Purple #6241C7 ΔE 0.073
- Dusk #4E5481 ΔE 0.078
- Blurple #5539CC ΔE 0.079
Use #573E9B 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.