#543B71
Closest named color: Dark Slate Blue (#483D8B). oklch(40.5% 0.092 304), rgb(84, 59, 113).
Aa
White text reads best on this color (9.37:1).
About this color
#543B71 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.092 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.048 away. White text reads best on it, at 9.37:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.092) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.24:1 |
| White text | 9.37:1 |
Values
| HEX | #543B71 |
| RGB | rgb(84, 59, 113) |
| HSL | hsl(268, 31%, 34%) |
| OKLCH | oklch(40.5% 0.092 304) |
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 #543B71 | 9.37:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #543B71 | 2.24:1 | Fails | Lc 12.5 | Not readable |
| #543B71 text on white | 9.37:1 | AAA | Lc 91.5 | Preferred for body text |
| #543B71 text on black | 2.24:1 | Fails | Lc -10.9 | 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
#F6F4F9
oklch(97% 0.007 304.2)
-
Step 100
100
#ECE7F3
oklch(93.5% 0.017 304.8)
-
Step 200
200
#DDD5EA
oklch(88.6% 0.03 303)
-
Step 300
300
#C8B9DD
oklch(81% 0.052 304.1)
-
Step 400
400
#AC93CC
oklch(70.6% 0.086 304.3)
-
Step 500
500
#9878BF
oklch(63.1% 0.109 304.2)
-
Step 600
600
#8360AC
oklch(55.7% 0.12 304)
-
Step 700
700
#6F4F93
oklch(49.2% 0.11 304.4)
-
Step 800
800 (this color)
#543B71
oklch(40.5% 0.092 304)
-
Step 900
900
#4A3760
oklch(37.6% 0.072 304.5)
-
Step 950
950
#2B2138
oklch(27% 0.044 303.6)
#543B71 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) | #2C4673 | 0.065 |
| Deuteranopia (no green cones) | #334670 | 0.058 |
| Tritanopia (no blue cones) | #4F4450 | 0.069 |
| Achromatopsia (no color) | #464646 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #543B71
#543B71
oklch(40.5% 0.092 304)
- #3F510E
#3F510E
oklch(40.6% 0.092 123.9)
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 #543B71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.048
- Blueberry #464196 ΔE 0.065
- Twilight #4E518B ΔE 0.067
- Dusk #4E5481 ΔE 0.069
- Rebecca Purple #663399 ΔE 0.077
- Dusty Grape #545775 ΔE 0.080
- Dark Grey Blue #29465B ΔE 0.085
- Cobalt #1E488F ΔE 0.088
Use #543B71 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.