#573C69
Closest named color: Dark Slate Blue (#483D8B). oklch(40.6% 0.08 310.8), rgb(87, 60, 105).
Aa
White text reads best on this color (9.31:1).
About this color
#573C69 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.080 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.063 away. White text reads best on it, at 9.31:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.080) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #573C69 |
| RGB | rgb(87, 60, 105) |
| HSL | hsl(276, 27%, 32%) |
| OKLCH | oklch(40.6% 0.08 310.8) |
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 #573C69 | 9.31:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #573C69 | 2.25:1 | Fails | Lc 12.6 | Not readable |
| #573C69 text on white | 9.31:1 | AAA | Lc 91.4 | Preferred for body text |
| #573C69 text on black | 2.25:1 | Fails | Lc -11.0 | 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
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#EDE7F1
oklch(93.6% 0.015 312.2)
-
Step 200
200
#DFD5E6
oklch(88.6% 0.025 311.7)
-
Step 300
300
#CAB9D7
oklch(80.9% 0.045 310.6)
-
Step 400
400
#AF94C3
oklch(70.7% 0.073 310.5)
-
Step 500
500
#9C79B4
oklch(63.2% 0.095 310.9)
-
Step 600
600
#8761A0
oklch(55.7% 0.104 311.1)
-
Step 700
700
#725089
oklch(49.1% 0.096 310.7)
-
Step 800
800 (this color)
#573C69
oklch(40.6% 0.08 310.8)
-
Step 900
900
#4C385A
oklch(37.7% 0.062 310.6)
-
Step 950
950
#2D2135
oklch(27.1% 0.04 311.2)
#573C69 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) | #33466B | 0.062 |
| Deuteranopia (no green cones) | #3A4768 | 0.055 |
| Tritanopia (no blue cones) | #55434D | 0.058 |
| Achromatopsia (no color) | #474747 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573C69
#573C69
oklch(40.6% 0.08 310.8)
- #3A5221
#3A5221
oklch(40.7% 0.08 130.9)
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 #573C69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.063
- Dusk #4E5481 ΔE 0.070
- Twilight #4E518B ΔE 0.072
- Dusty Grape #545775 ΔE 0.075
- Purple Brown #673A3F ΔE 0.076
- Blueberry #464196 ΔE 0.079
- Brownish Purple #76424E ΔE 0.081
- Dark Grey Blue #29465B ΔE 0.082
Use #573C69 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.