#433666
Closest named color: Dark Slate Blue (#483D8B). oklch(37% 0.081 294.6), rgb(67, 54, 102).
Aa
White text reads best on this color (10.72:1).
About this color
#433666 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.081 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.064 away. White text reads best on it, at 10.72:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.081) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.95:1 |
| White text | 10.72:1 |
Values
| HEX | #433666 |
| RGB | rgb(67, 54, 102) |
| HSL | hsl(256, 31%, 31%) |
| OKLCH | oklch(37% 0.081 294.6) |
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 #433666 | 10.72:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #433666 | 1.95:1 | Fails | Lc 9.2 | Not readable |
| #433666 text on white | 10.72:1 | AAA | Lc 94.8 | Preferred for body text |
| #433666 text on black | 1.95:1 | Fails | Lc -7.9 | 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 900.
-
Step 50
50
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#EAE8F5
oklch(93.6% 0.018 293.1)
-
Step 200
200
#DAD5EE
oklch(88.5% 0.034 294.9)
-
Step 300
300
#C3BAE5
oklch(81% 0.061 294.6)
-
Step 400
400
#A495D7
oklch(70.7% 0.096 294.2)
-
Step 500
500
#8F79CD
oklch(63.1% 0.125 294.6)
-
Step 600
600
#7A60B9
oklch(55.5% 0.135 295.1)
-
Step 700
700
#664FA0
oklch(49% 0.126 294.3)
-
Step 800
800
#534182
oklch(42.6% 0.105 294.2)
-
Step 900
900 (this color)
#433666
oklch(37% 0.081 294.6)
-
Step 950
950
#28213D
oklch(27% 0.052 294.2)
#433666 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) | #273E68 | 0.046 |
| Deuteranopia (no green cones) | #293D65 | 0.043 |
| Tritanopia (no blue cones) | #3B3F49 | 0.066 |
| Achromatopsia (no color) | #3E3E3E | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #433666
#433666
oklch(37% 0.081 294.6)
- #3F4404
#3F4404
oklch(37% 0.081 114.5)
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 #433666, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.065
- Dark Grey Blue #29465B ΔE 0.066
- Twilight Blue #0A437A ΔE 0.073
- Dark Blue Grey #1F3B4D ΔE 0.074
- Marine Blue #01386A ΔE 0.075
- Charcoal #264653 ΔE 0.077
- Onyx #343A40 ΔE 0.077
Use #433666 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.