#573B99
Closest named color: Blueberry (#464196). oklch(43.6% 0.147 293), rgb(87, 59, 153).
Aa
White text reads best on this color (8.43:1).
About this color
#573B99 is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.147 and its hue 293°. 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 8.43:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.147) |
| Temperature | in between |
| Nearest name | Blueberry (#464196) |
| Black text | 2.49:1 |
| White text | 8.43:1 |
Values
| HEX | #573B99 |
| RGB | rgb(87, 59, 153) |
| HSL | hsl(258, 44%, 42%) |
| OKLCH | oklch(43.6% 0.147 293) |
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 #573B99 | 8.43:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #573B99 | 2.49:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #573B99 text on white | 8.43:1 | AAA | Lc 88.7 | Fine for body text |
| #573B99 text on black | 2.49:1 | Fails | Lc -13.5 | 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
#DAD4F7
oklch(88.6% 0.048 293.3)
-
Step 300
300
#C2B7F4
oklch(81% 0.086 292.6)
-
Step 400
400
#A48FEE
oklch(70.7% 0.137 292.7)
-
Step 500
500
#9070E8
oklch(63.2% 0.175 293)
-
Step 600
600
#7B54D6
oklch(55.6% 0.19 293)
-
Step 700
700
#6843BA
oklch(49% 0.178 293)
-
Step 800
800 (this color)
#573B99
oklch(43.6% 0.147 293)
-
Step 900
900
#453278
oklch(37.7% 0.115 292.5)
-
Step 950
950
#281E46
oklch(27% 0.072 292.4)
#573B99 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 | 0.094 |
| Deuteranopia (no green cones) | #004B97 | 0.094 |
| Tritanopia (no blue cones) | #455064 | 0.117 |
| Achromatopsia (no color) | #4D4D4D | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B99
#573B99
oklch(43.6% 0.147 293)
- #525600
#525600
oklch(43.5% 0.097 112.9)
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 #573B99, 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 0.031
- Dark Slate Blue #483D8B ΔE 0.035
- Twilight #4E518B ΔE 0.064
- Blue With A Hint Of Purple #533CC6 ΔE 0.073
- Chrysanthemum #560BAD ΔE 0.076
- Bluey Purple #6241C7 ΔE 0.077
- Blurple #5539CC ΔE 0.082
Use #573B99 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.