#573F80
Closest named color: Dark Slate Blue (#483D8B). oklch(42.5% 0.106 298.8), rgb(87, 63, 128).
Aa
White text reads best on this color (8.64:1).
About this color
#573F80 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.106 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 0.033 away. White text reads best on it, at 8.64:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.106) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.42:1 |
| White text | 8.64:1 |
Values
| HEX | #573F80 |
| RGB | rgb(87, 63, 128) |
| HSL | hsl(262, 34%, 37%) |
| OKLCH | oklch(42.5% 0.106 298.8) |
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 #573F80 | 8.64:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #573F80 | 2.42:1 | Fails | Lc 14.5 | Not readable |
| #573F80 text on white | 8.64:1 | AAA | Lc 89.5 | Fine for body text |
| #573F80 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
#EBE7F5
oklch(93.5% 0.019 299.1)
-
Step 200
200
#DCD5ED
oklch(88.6% 0.033 299)
-
Step 300
300
#C6B8E4
oklch(80.9% 0.063 299.5)
-
Step 400
400
#A993D6
oklch(70.8% 0.099 298.9)
-
Step 500
500
#9477CB
oklch(63.1% 0.126 298.6)
-
Step 600
600
#7F5EB8
oklch(55.6% 0.138 298.8)
-
Step 700
700
#6B4D9F
oklch(49.1% 0.129 298.4)
-
Step 800
800 (this color)
#573F80
oklch(42.5% 0.106 298.8)
-
Step 900
900
#483667
oklch(37.6% 0.083 299.3)
-
Step 950
950
#2A203C
oklch(26.9% 0.052 299.3)
#573F80 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) | #294C82 | 0.071 |
| Deuteranopia (no green cones) | #2F4B7E | 0.066 |
| Tritanopia (no blue cones) | #4F4B59 | 0.083 |
| Achromatopsia (no color) | #4C4C4C | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573F80
#573F80
oklch(42.5% 0.106 298.8)
- #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 #573F80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.033
- Blueberry #464196 ΔE 0.046
- Twilight #4E518B ΔE 0.049
- Rebecca Purple #663399 ΔE 0.057
- Dusk #4E5481 ΔE 0.058
- Dusty Grape #545775 ΔE 0.075
- Dusk Blue #26538D ΔE 0.080
- Cobalt #1E488F ΔE 0.080
Use #573F80 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.