#573E7B
Closest named color: Dark Slate Blue (#483D8B). oklch(42% 0.101 301.1), rgb(87, 62, 123).
Aa
White text reads best on this color (8.82:1).
About this color
#573E7B is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.101 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.038 away. White text reads best on it, at 8.82:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.101) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.38:1 |
| White text | 8.82:1 |
Values
| HEX | #573E7B |
| RGB | rgb(87, 62, 123) |
| HSL | hsl(265, 33%, 36%) |
| OKLCH | oklch(42% 0.101 301.1) |
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 #573E7B | 8.82:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #573E7B | 2.38:1 | Fails | Lc 14.0 | Not readable |
| #573E7B text on white | 8.82:1 | AAA | Lc 90.0 | Preferred for body text |
| #573E7B text on black | 2.38:1 | Fails | Lc -12.3 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#ECE7F4
oklch(93.6% 0.018 303.4)
-
Step 200
200
#DCD5EC
oklch(88.6% 0.032 299.6)
-
Step 300
300
#C7B8E1
oklch(80.8% 0.059 301.8)
-
Step 400
400
#AB93D3
oklch(70.8% 0.095 301.2)
-
Step 500
500
#9677C7
oklch(63.1% 0.121 300.8)
-
Step 600
600
#815EB3
oklch(55.5% 0.132 301.2)
-
Step 700
700
#6D4D9A
oklch(49% 0.123 301.2)
-
Step 800
800 (this color)
#573E7B
oklch(42% 0.101 301.1)
-
Step 900
900
#493765
oklch(37.8% 0.079 300.7)
-
Step 950
950
#2B203B
oklch(27% 0.051 301.9)
#573E7B 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) | #2B4A7D | 0.069 |
| Deuteranopia (no green cones) | #324A79 | 0.063 |
| Tritanopia (no blue cones) | #504956 | 0.078 |
| Achromatopsia (no color) | #4A4A4A | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573E7B
#573E7B
oklch(42% 0.101 301.1)
- #455500
#455500
oklch(42.1% 0.101 121.4)
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 #573E7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.038
- Blueberry #464196 ΔE 0.053
- Twilight #4E518B ΔE 0.054
- Dusk #4E5481 ΔE 0.060
- Rebecca Purple #663399 ΔE 0.063
- Dusty Grape #545775 ΔE 0.074
- Dusk Blue #26538D ΔE 0.083
- Cobalt #1E488F ΔE 0.083
Use #573E7B 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.