#43366B
Closest named color: Dark Slate Blue (#483D8B). oklch(37.4% 0.089 292.9), rgb(67, 54, 107).
Aa
White text reads best on this color (10.61:1).
About this color
#43366B is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.089 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.056 away. White text reads best on it, at 10.61:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.089) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.97:1 |
| White text | 10.61:1 |
Values
| HEX | #43366B |
| RGB | rgb(67, 54, 107) |
| HSL | hsl(255, 33%, 32%) |
| OKLCH | oklch(37.4% 0.089 292.9) |
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 #43366B | 10.61:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #43366B | 1.97:1 | Fails | Lc 9.4 | Not readable |
| #43366B text on white | 10.61:1 | AAA | Lc 94.5 | Preferred for body text |
| #43366B text on black | 1.97:1 | Fails | Lc -8.1 | 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 900.
-
Step 50
50
#F5F4FB
oklch(97% 0.009 292.8)
-
Step 100
100
#EAE8F6
oklch(93.7% 0.019 292.6)
-
Step 200
200
#D9D5F0
oklch(88.4% 0.037 292.4)
-
Step 300
300
#C1B9E9
oklch(80.8% 0.068 292.5)
-
Step 400
400
#A394DD
oklch(70.7% 0.106 292.9)
-
Step 500
500
#8D78D4
oklch(63.2% 0.136 292.6)
-
Step 600
600
#785FC1
oklch(55.7% 0.148 292.7)
-
Step 700
700
#654EA7
oklch(49.2% 0.138 292.5)
-
Step 800
800
#524087
oklch(42.7% 0.114 292.6)
-
Step 900
900 (this color)
#43366B
oklch(37.4% 0.089 292.9)
-
Step 950
950
#28213F
oklch(27.1% 0.055 293.1)
#43366B 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) | #243F6D | 0.049 |
| Deuteranopia (no green cones) | #253E6A | 0.048 |
| Tritanopia (no blue cones) | #39404B | 0.072 |
| Achromatopsia (no color) | #3E3E3E | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #43366B
#43366B
oklch(37.4% 0.089 292.9)
- #414500
#414500
oklch(37.4% 0.084 113.5)
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 #43366B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.069
- Dark Grey Blue #29465B ΔE 0.070
- Twilight Blue #0A437A ΔE 0.071
- Blueberry #464196 ΔE 0.075
- Marine Blue #01386A ΔE 0.075
- Dark Blue Grey #1F3B4D ΔE 0.080
- Cobalt #1E488F ΔE 0.081
Use #43366B 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.