#573E87
Closest named color: Dark Slate Blue (#483D8B). oklch(42.8% 0.118 296.9), rgb(87, 62, 135).
Aa
White text reads best on this color (8.59:1).
About this color
#573E87 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.118 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.028 away. White text reads best on it, at 8.59:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.118) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.44:1 |
| White text | 8.59:1 |
Values
| HEX | #573E87 |
| RGB | rgb(87, 62, 135) |
| HSL | hsl(261, 37%, 39%) |
| OKLCH | oklch(42.8% 0.118 296.9) |
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 #573E87 | 8.59:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #573E87 | 2.44:1 | Fails | Lc 14.7 | Not readable |
| #573E87 text on white | 8.59:1 | AAA | Lc 89.3 | Fine for body text |
| #573E87 text on black | 2.44:1 | Fails | Lc -12.9 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F6
oklch(93.5% 0.021 298.2)
-
Step 200
200
#DBD4F0
oklch(88.4% 0.039 297)
-
Step 300
300
#C5B8E8
oklch(80.9% 0.068 297.3)
-
Step 400
400
#A892DD
oklch(70.8% 0.11 297)
-
Step 500
500
#9375D3
oklch(63.1% 0.14 296.9)
-
Step 600
600
#7E5BC1
oklch(55.5% 0.154 296.9)
-
Step 700
700
#6B4BA6
oklch(49.2% 0.141 297.1)
-
Step 800
800 (this color)
#573E87
oklch(42.8% 0.118 296.9)
-
Step 900
900
#47356C
oklch(37.6% 0.092 296.8)
-
Step 950
950
#2A203F
oklch(27.1% 0.057 297.3)
#573E87 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) | #214C8A | 0.078 |
| Deuteranopia (no green cones) | #284B85 | 0.072 |
| Tritanopia (no blue cones) | #4C4C5C | 0.092 |
| Achromatopsia (no color) | #4C4C4C | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573E87
#573E87
oklch(42.8% 0.118 296.9)
- #4C5600
#4C5600
oklch(42.9% 0.099 117.2)
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 #573E87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.028
- Blueberry #464196 ΔE 0.038
- Rebecca Purple #663399 ΔE 0.047
- Twilight #4E518B ΔE 0.051
- Dusk #4E5481 ΔE 0.064
- Cobalt #1E488F ΔE 0.079
- Dusk Blue #26538D ΔE 0.081
- Dusty Grape #545775 ΔE 0.082
Use #573E87 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.