#573F7F
Closest named color: Dark Slate Blue (#483D8B). oklch(42.5% 0.105 299.2), rgb(87, 63, 127).
Aa
White text reads best on this color (8.66:1).
About this color
#573F7F is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.105 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.034 away. White text reads best on it, at 8.66:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.42:1 |
| White text | 8.66:1 |
Values
| HEX | #573F7F |
| RGB | rgb(87, 63, 127) |
| HSL | hsl(263, 34%, 37%) |
| OKLCH | oklch(42.5% 0.105 299.2) |
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 #573F7F | 8.66:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #573F7F | 2.42:1 | Fails | Lc 14.4 | Not readable |
| #573F7F text on white | 8.66:1 | AAA | Lc 89.6 | Fine for body text |
| #573F7F text on black | 2.42:1 | Fails | Lc -12.7 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#EBE7F4
oklch(93.5% 0.018 300.1)
-
Step 200
200
#DCD5ED
oklch(88.6% 0.033 299)
-
Step 300
300
#C6B8E3
oklch(80.8% 0.062 299.9)
-
Step 400
400
#A993D5
oklch(70.7% 0.097 299.2)
-
Step 500
500
#9577CA
oklch(63.2% 0.125 299.5)
-
Step 600
600
#7F5EB7
oklch(55.6% 0.137 299)
-
Step 700
700
#6C4D9E
oklch(49.1% 0.128 299.3)
-
Step 800
800 (this color)
#573F7F
oklch(42.5% 0.105 299.2)
-
Step 900
900
#483767
oklch(37.8% 0.082 298.8)
-
Step 950
950
#2A203C
oklch(26.9% 0.052 299.3)
#573F7F 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) | #2A4B81 | 0.069 |
| Deuteranopia (no green cones) | #304B7D | 0.065 |
| Tritanopia (no blue cones) | #4F4B59 | 0.082 |
| Achromatopsia (no color) | #4B4B4B | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573F7F
#573F7F
oklch(42.5% 0.105 299.2)
- #495500
#495500
oklch(42.4% 0.099 118.7)
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 #573F7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.034
- Blueberry #464196 ΔE 0.047
- Twilight #4E518B ΔE 0.050
- Rebecca Purple #663399 ΔE 0.058
- Dusk #4E5481 ΔE 0.058
- Dusty Grape #545775 ΔE 0.074
- Dusk Blue #26538D ΔE 0.080
- Cobalt #1E488F ΔE 0.081
Use #573F7F 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.