#573BA4
Closest named color: Rebecca Purple (#663399). oklch(44.4% 0.161 290.6), rgb(87, 59, 164).
Aa
White text reads best on this color (8.18:1).
About this color
#573BA4 is a dark, vivid purple. In OKLCH its lightness is 44%, its chroma 0.161 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 0.036 away. White text reads best on it, at 8.18:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | vivid (0.161) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.56:1 |
| White text | 8.18:1 |
Values
| HEX | #573BA4 |
| RGB | rgb(87, 59, 164) |
| HSL | hsl(256, 47%, 44%) |
| OKLCH | oklch(44.4% 0.161 290.6) |
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 #573BA4 | 8.18:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #573BA4 | 2.56:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #573BA4 text on white | 8.18:1 | AAA | Lc 87.8 | Fine for body text |
| #573BA4 text on black | 2.56:1 | Fails | Lc -14.3 | 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
#E9E7FB
oklch(93.5% 0.027 290.5)
-
Step 200
200
#D8D4FA
oklch(88.5% 0.052 290.1)
-
Step 300
300
#C0B6F9
oklch(80.8% 0.094 291)
-
Step 400
400
#A18EF7
oklch(70.8% 0.151 290.3)
-
Step 500
500
#8C6DF3
oklch(63% 0.193 290.4)
-
Step 600
600
#7850E2
oklch(55.6% 0.21 290.5)
-
Step 700
700
#6640C4
oklch(49.2% 0.194 290.7)
-
Step 800
800 (this color)
#573BA4
oklch(44.4% 0.161 290.6)
-
Step 900
900
#44307E
oklch(37.7% 0.126 290.9)
-
Step 950
950
#271D4A
oklch(27% 0.08 290.2)
#573BA4 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) | #0051A7 | 0.093 |
| Deuteranopia (no green cones) | #004DA2 | 0.092 |
| Tritanopia (no blue cones) | #3F546A | 0.130 |
| Achromatopsia (no color) | #4F4F4F | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573BA4
#573BA4
oklch(44.4% 0.161 290.6)
- #575800
#575800
oklch(44.5% 0.097 110.5)
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 #573BA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.036
- Blueberry #464196 ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.048
- Blue With A Hint Of Purple #533CC6 ΔE 0.055
- Bluey Purple #6241C7 ΔE 0.060
- Blurple #5539CC ΔE 0.064
- Chrysanthemum #560BAD ΔE 0.069
- Majorelle Blue #3F37C9 ΔE 0.073
Use #573BA4 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.