#573F9E
Closest named color: Blueberry (#464196). oklch(44.6% 0.148 290.8), rgb(87, 63, 158).
Aa
White text reads best on this color (8.04:1).
About this color
#573F9E is a dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.148 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.031 away. White text reads best on it, at 8.04:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Blueberry (#464196) |
| Black text | 2.60:1 |
| White text | 8.04:1 |
Values
| HEX | #573F9E |
| RGB | rgb(87, 63, 158) |
| HSL | hsl(255, 43%, 43%) |
| OKLCH | oklch(44.6% 0.148 290.8) |
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 #573F9E | 8.04:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #573F9E | 2.60:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #573F9E text on white | 8.04:1 | AAA | Lc 87.5 | Fine for body text |
| #573F9E text on black | 2.60:1 | Fails | Lc -14.6 | 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
#E9E7FA
oklch(93.5% 0.026 290.7)
-
Step 200
200
#D8D4F7
oklch(88.4% 0.048 290.6)
-
Step 300
300
#C0B7F5
oklch(80.8% 0.087 291)
-
Step 400
400
#A190F0
oklch(70.8% 0.138 290.6)
-
Step 500
500
#8C71EA
oklch(63.1% 0.176 290.8)
-
Step 600
600
#7755D8
oklch(55.5% 0.192 290.8)
-
Step 700
700
#6545BC
oklch(49.2% 0.178 290.8)
-
Step 800
800 (this color)
#573F9E
oklch(44.6% 0.148 290.8)
-
Step 900
900
#433379
oklch(37.8% 0.115 290.4)
-
Step 950
950
#271E47
oklch(26.9% 0.074 290.7)
#573F9E 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) | #0052A1 | 0.091 |
| Deuteranopia (no green cones) | #004E9C | 0.090 |
| Tritanopia (no blue cones) | #425468 | 0.120 |
| Achromatopsia (no color) | #505050 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573F9E
#573F9E
oklch(44.6% 0.148 290.8)
- #575900
#575900
oklch(44.7% 0.098 111.3)
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 #573F9E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.031
- Rebecca Purple #663399 ΔE 0.036
- Dark Slate Blue #483D8B ΔE 0.041
- Twilight #4E518B ΔE 0.060
- Blue With A Hint Of Purple #533CC6 ΔE 0.065
- Bluey Purple #6241C7 ΔE 0.068
- Blurple #5539CC ΔE 0.074
- Dusk #4E5481 ΔE 0.079
Use #573F9E 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.