#573C8E
Closest named color: Dark Slate Blue (#483D8B). oklch(42.9% 0.131 295.6), rgb(87, 60, 142).
Aa
White text reads best on this color (8.59:1).
About this color
#573C8E is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.131 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.027 away. White text reads best on it, at 8.59:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.44:1 |
| White text | 8.59:1 |
Values
| HEX | #573C8E |
| RGB | rgb(87, 60, 142) |
| HSL | hsl(260, 41%, 40%) |
| OKLCH | oklch(42.9% 0.131 295.6) |
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 #573C8E | 8.59:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #573C8E | 2.44:1 | Fails | Lc 14.7 | Not readable |
| #573C8E text on white | 8.59:1 | AAA | Lc 89.3 | Fine for body text |
| #573C8E text on black | 2.44:1 | Fails | Lc -13.0 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EBE7F7
oklch(93.6% 0.022 297.4)
-
Step 200
200
#DBD4F3
oklch(88.5% 0.043 295.9)
-
Step 300
300
#C4B7ED
oklch(80.8% 0.076 295.7)
-
Step 400
400
#A790E4
oklch(70.7% 0.122 295.7)
-
Step 500
500
#9272DC
oklch(63% 0.156 295.5)
-
Step 600
600
#7E58CA
oklch(55.6% 0.17 295.7)
-
Step 700
700
#6A47AE
oklch(49% 0.158 295.7)
-
Step 800
800 (this color)
#573C8E
oklch(42.9% 0.131 295.6)
-
Step 900
900
#473471
oklch(37.8% 0.102 295.5)
-
Step 950
950
#291F42
oklch(27% 0.064 294.9)
#573C8E 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) | #134D91 | 0.088 |
| Deuteranopia (no green cones) | #1D4B8C | 0.082 |
| Tritanopia (no blue cones) | #4A4D5F | 0.103 |
| Achromatopsia (no color) | #4C4C4C | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573C8E
#573C8E
oklch(42.9% 0.131 295.6)
- #4E5500
#4E5500
oklch(42.8% 0.097 115.1)
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 #573C8E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.027
- Blueberry #464196 ΔE 0.032
- Rebecca Purple #663399 ΔE 0.037
- Twilight #4E518B ΔE 0.057
- Dusk #4E5481 ΔE 0.072
- Cobalt #1E488F ΔE 0.080
- Dusk Blue #26538D ΔE 0.085
- Denim Blue #3B5B92 ΔE 0.087
Use #573C8E 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.