#433F81
Closest named color: Dark Slate Blue (#483D8B). oklch(40.7% 0.108 283.2), rgb(67, 63, 129).
Aa
White text reads best on this color (9.26:1).
About this color
#433F81 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.108 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.020 away. White text reads best on it, at 9.26:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.26:1 |
| White text | 9.26:1 |
Values
| HEX | #433F81 |
| RGB | rgb(67, 63, 129) |
| HSL | hsl(244, 34%, 38%) |
| OKLCH | oklch(40.7% 0.108 283.2) |
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 #433F81 | 9.26:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #433F81 | 2.26:1 | Fails | Lc 12.8 | Not readable |
| #433F81 text on white | 9.26:1 | AAA | Lc 91.2 | Preferred for body text |
| #433F81 text on black | 2.26:1 | Fails | Lc -11.1 | 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 800.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E9F6
oklch(93.7% 0.018 282.5)
-
Step 200
200
#D5D7F0
oklch(88.5% 0.034 282)
-
Step 300
300
#BABCE9
oklch(80.9% 0.063 282.9)
-
Step 400
400
#9898DE
oklch(70.7% 0.102 283.5)
-
Step 500
500
#807DD4
oklch(63% 0.129 283.6)
-
Step 600
600
#6A65C1
oklch(55.6% 0.139 283.3)
-
Step 700
700
#5953A7
oklch(49.1% 0.131 283.7)
-
Step 800
800 (this color)
#433F81
oklch(40.7% 0.108 283.2)
-
Step 900
900
#3C3A6C
oklch(37.6% 0.084 283.4)
-
Step 950
950
#23223F
oklch(26.9% 0.053 283.8)
#433F81 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) | #224983 | 0.046 |
| Deuteranopia (no green cones) | #1F4580 | 0.047 |
| Tritanopia (no blue cones) | #2E4D5A | 0.092 |
| Achromatopsia (no color) | #474747 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #433F81
#433F81
oklch(40.7% 0.108 283.2)
- #524B00
#524B00
oklch(40.7% 0.086 103.4)
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 #433F81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.020
- Blueberry #464196 ΔE 0.035
- Cobalt #1E488F ΔE 0.051
- Twilight #4E518B ΔE 0.055
- Dusk Blue #26538D ΔE 0.062
- Twilight Blue #0A437A ΔE 0.062
- Light Navy #155084 ΔE 0.063
- Dusk #4E5481 ΔE 0.064
Use #433F81 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.