#573F79
Closest named color: Dark Slate Blue (#483D8B). oklch(42.1% 0.097 301.5), rgb(87, 63, 121).
Aa
White text reads best on this color (8.77:1).
About this color
#573F79 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.097 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 0.041 away. White text reads best on it, at 8.77:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.097) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.39:1 |
| White text | 8.77:1 |
Values
| HEX | #573F79 |
| RGB | rgb(87, 63, 121) |
| HSL | hsl(265, 32%, 36%) |
| OKLCH | oklch(42.1% 0.097 301.5) |
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 #573F79 | 8.77:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #573F79 | 2.39:1 | Fails | Lc 14.1 | Not readable |
| #573F79 text on white | 8.77:1 | AAA | Lc 89.9 | Fine for body text |
| #573F79 text on black | 2.39:1 | Fails | Lc -12.4 | 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
#EBE7F3
oklch(93.5% 0.017 301.2)
-
Step 200
200
#DCD5EB
oklch(88.5% 0.031 300.3)
-
Step 300
300
#C7B9E0
oklch(81% 0.056 301.5)
-
Step 400
400
#AA93D0
oklch(70.6% 0.091 301.4)
-
Step 500
500
#9678C4
oklch(63.1% 0.115 301.4)
-
Step 600
600
#815FB0
oklch(55.5% 0.126 301.8)
-
Step 700
700
#6D4E97
oklch(49% 0.117 301.9)
-
Step 800
800 (this color)
#573F79
oklch(42.1% 0.097 301.5)
-
Step 900
900
#493763
oklch(37.7% 0.076 301.7)
-
Step 950
950
#2B213A
oklch(27.2% 0.047 301.8)
#573F79 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) | #2E4A7B | 0.065 |
| Deuteranopia (no green cones) | #344A78 | 0.060 |
| Tritanopia (no blue cones) | #514956 | 0.074 |
| Achromatopsia (no color) | #4B4B4B | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573F79
#573F79
oklch(42.1% 0.097 301.5)
- #455509
#455509
oklch(42.1% 0.097 121.7)
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 #573F79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.041
- Twilight #4E518B ΔE 0.053
- Blueberry #464196 ΔE 0.055
- Dusk #4E5481 ΔE 0.058
- Rebecca Purple #663399 ΔE 0.067
- Dusty Grape #545775 ΔE 0.071
- Dusk Blue #26538D ΔE 0.082
- YInMn Blue #415A77 ΔE 0.083
Use #573F79 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.