#573B79
Closest named color: Dark Slate Blue (#483D8B). oklch(41.4% 0.104 303), rgb(87, 59, 121).
Aa
White text reads best on this color (9.10:1).
About this color
#573B79 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.104 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.040 away. White text reads best on it, at 9.10:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.104) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.30:1 |
| White text | 9.10:1 |
Values
| HEX | #573B79 |
| RGB | rgb(87, 59, 121) |
| HSL | hsl(267, 34%, 35%) |
| OKLCH | oklch(41.4% 0.104 303) |
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 #573B79 | 9.10:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #573B79 | 2.30:1 | Fails | Lc 13.2 | Not readable |
| #573B79 text on white | 9.10:1 | AAA | Lc 90.8 | Preferred for body text |
| #573B79 text on black | 2.30:1 | Fails | Lc -11.6 | 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
#DDD4EC
oklch(88.4% 0.034 302.7)
-
Step 300
300
#C8B8E1
oklch(80.9% 0.059 302.9)
-
Step 400
400
#AD92D3
oklch(70.8% 0.097 303)
-
Step 500
500
#9976C7
oklch(63.2% 0.123 302.9)
-
Step 600
600
#845DB3
oklch(55.7% 0.134 303.3)
-
Step 700
700
#6F4C9A
oklch(49% 0.125 302.8)
-
Step 800
800 (this color)
#573B79
oklch(41.4% 0.104 303)
-
Step 900
900
#4A3665
oklch(37.7% 0.081 302.3)
-
Step 950
950
#2B203B
oklch(27% 0.051 301.9)
#573B79 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) | #28487B | 0.075 |
| Deuteranopia (no green cones) | #304877 | 0.068 |
| Tritanopia (no blue cones) | #514654 | 0.078 |
| Achromatopsia (no color) | #484848 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B79
#573B79
oklch(41.4% 0.104 303)
- #415400
#415400
oklch(41.5% 0.102 123.3)
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 #573B79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.040
- Blueberry #464196 ΔE 0.056
- Twilight #4E518B ΔE 0.062
- Rebecca Purple #663399 ΔE 0.063
- Dusk #4E5481 ΔE 0.068
- Dusty Grape #545775 ΔE 0.081
- Cobalt #1E488F ΔE 0.087
- Dusk Blue #26538D ΔE 0.089
Use #573B79 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.