#433F99
Closest named color: Blueberry (#464196). oklch(42.5% 0.143 280.4), rgb(67, 63, 153).
Aa
White text reads best on this color (8.71:1).
About this color
#433F99 is a dark, vivid purple. In OKLCH its lightness is 42%, its chroma 0.143 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.009 away. White text reads best on it, at 8.71:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.40:1 |
| White text | 8.71:1 |
Values
| HEX | #433F99 |
| RGB | rgb(67, 63, 153) |
| HSL | hsl(243, 42%, 42%) |
| OKLCH | oklch(42.5% 0.143 280.4) |
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 #433F99 | 8.71:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #433F99 | 2.40:1 | Fails | Lc 14.4 | Not readable |
| #433F99 text on white | 8.71:1 | AAA | Lc 89.5 | Fine for body text |
| #433F99 text on black | 2.40:1 | Fails | Lc -12.7 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E8FA
oklch(93.5% 0.024 280.9)
-
Step 200
200
#D3D6F8
oklch(88.5% 0.047 281.4)
-
Step 300
300
#B6BBF6
oklch(80.9% 0.083 280.6)
-
Step 400
400
#9296F2
oklch(70.8% 0.133 280.5)
-
Step 500
500
#7979ED
oklch(63.2% 0.17 280.4)
-
Step 600
600
#645EDB
oklch(55.6% 0.185 280.7)
-
Step 700
700
#534DBE
oklch(49.1% 0.172 280.4)
-
Step 800
800 (this color)
#433F99
oklch(42.5% 0.143 280.4)
-
Step 900
900
#38377A
oklch(37.6% 0.111 280.3)
-
Step 950
950
#212148
oklch(27.1% 0.071 280.6)
#433F99 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) | #004E9C | 0.063 |
| Deuteranopia (no green cones) | #004897 | 0.060 |
| Tritanopia (no blue cones) | #195465 | 0.123 |
| Achromatopsia (no color) | #4B4B4B | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #433F99
#433F99
oklch(42.5% 0.143 280.4)
- #594F00
#594F00
oklch(42.4% 0.089 101)
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 #433F99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.009
- Dark Slate Blue #483D8B ΔE 0.024
- Cobalt #1E488F ΔE 0.051
- Sapphire #2138AB ΔE 0.058
- Twilight #4E518B ΔE 0.060
- Rebecca Purple #663399 ΔE 0.065
- Dusk Blue #26538D ΔE 0.065
- Light Navy #155084 ΔE 0.075
Use #433F99 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.