#573AAB
Closest named color: Rebecca Purple (#663399). oklch(44.8% 0.171 289.4), rgb(87, 58, 171).
Aa
White text reads best on this color (8.08:1).
About this color
#573AAB is a dark, vivid purple. In OKLCH its lightness is 45%, its chroma 0.171 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.042 away. White text reads best on it, at 8.08:1.
| Hue family | Purples |
| Lightness | dark (45%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.59:1 |
| White text | 8.08:1 |
Values
| HEX | #573AAB |
| RGB | rgb(87, 58, 171) |
| HSL | hsl(255, 49%, 45%) |
| OKLCH | oklch(44.8% 0.171 289.4) |
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 #573AAB | 8.08:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #573AAB | 2.59:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #573AAB text on white | 8.08:1 | AAA | Lc 87.5 | Fine for body text |
| #573AAB text on black | 2.59:1 | Fails | Lc -14.7 | 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
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E9E7FD
oklch(93.6% 0.03 290)
-
Step 200
200
#D7D4FC
oklch(88.5% 0.055 288.7)
-
Step 300
300
#BFB6FD
oklch(80.9% 0.1 289.8)
-
Step 400
400
#A08DFD
oklch(70.8% 0.16 289.5)
-
Step 500
500
#8B6BFA
oklch(63.1% 0.204 289.5)
-
Step 600
600
#774DE9
oklch(55.6% 0.222 289.5)
-
Step 700
700
#643CCB
oklch(49.1% 0.207 289.3)
-
Step 800
800 (this color)
#573AAB
oklch(44.8% 0.171 289.4)
-
Step 900
900
#432F82
oklch(37.7% 0.133 289.6)
-
Step 950
950
#271C4C
oklch(26.9% 0.085 290)
#573AAB 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) | #0052AF | 0.093 |
| Deuteranopia (no green cones) | #004DA9 | 0.091 |
| Tritanopia (no blue cones) | #3B566D | 0.140 |
| Achromatopsia (no color) | #505050 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573AAB
#573AAB
oklch(44.8% 0.171 289.4)
- #595900
#595900
oklch(44.9% 0.098 109.8)
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 #573AAB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.042
- Blue With A Hint Of Purple #533CC6 ΔE 0.044
- Blueberry #464196 ΔE 0.046
- Bluey Purple #6241C7 ΔE 0.051
- Blurple #5539CC ΔE 0.053
- Dark Slate Blue #483D8B ΔE 0.058
- Majorelle Blue #3F37C9 ΔE 0.063
- Chrysanthemum #560BAD ΔE 0.065
Use #573AAB 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.