#543B8F
Closest named color: Dark Slate Blue (#483D8B). oklch(42.5% 0.133 293.7), rgb(84, 59, 143).
Aa
White text reads best on this color (8.75:1).
About this color
#543B8F is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.133 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.022 away. White text reads best on it, at 8.75:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.133) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.39:1 |
| White text | 8.75:1 |
Values
| HEX | #543B8F |
| RGB | rgb(84, 59, 143) |
| HSL | hsl(258, 42%, 40%) |
| OKLCH | oklch(42.5% 0.133 293.7) |
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 #543B8F | 8.75:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #543B8F | 2.39:1 | Fails | Lc 14.3 | Not readable |
| #543B8F text on white | 8.75:1 | AAA | Lc 89.7 | Fine for body text |
| #543B8F text on black | 2.39:1 | Fails | Lc -12.6 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#EAE7F8
oklch(93.5% 0.023 294.1)
-
Step 200
200
#DAD4F4
oklch(88.5% 0.044 294.1)
-
Step 300
300
#C2B8EF
oklch(81% 0.077 292.9)
-
Step 400
400
#A591E7
oklch(70.8% 0.125 293.7)
-
Step 500
500
#9073DF
oklch(63.2% 0.158 293.7)
-
Step 600
600
#7B58CD
oklch(55.5% 0.174 293.8)
-
Step 700
700
#6848B1
oklch(49.2% 0.16 293.7)
-
Step 800
800 (this color)
#543B8F
oklch(42.5% 0.133 293.7)
-
Step 900
900
#453473
oklch(37.7% 0.104 293.2)
-
Step 950
950
#281F43
oklch(27% 0.065 293)
#543B8F 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) | #0B4C92 | 0.087 |
| Deuteranopia (no green cones) | #15498D | 0.083 |
| Tritanopia (no blue cones) | #454D5F | 0.106 |
| Achromatopsia (no color) | #4B4B4B | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #543B8F
#543B8F
oklch(42.5% 0.133 293.7)
- #4F5400
#4F5400
oklch(42.7% 0.096 113.7)
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 #543B8F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.022
- Blueberry #464196 ΔE 0.028
- Rebecca Purple #663399 ΔE 0.040
- Twilight #4E518B ΔE 0.059
- Dusk #4E5481 ΔE 0.075
- Cobalt #1E488F ΔE 0.076
- Dusk Blue #26538D ΔE 0.083
- Chrysanthemum #560BAD ΔE 0.085
Use #543B8F 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.