#4A3783
Closest named color: Dark Slate Blue (#483D8B). oklch(39.9% 0.123 291.4), rgb(74, 55, 131).
Aa
White text reads best on this color (9.69:1).
About this color
#4A3783 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.123 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.019 away. White text reads best on it, at 9.69:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.123) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.16:1 |
| White text | 9.69:1 |
Values
| HEX | #4A3783 |
| RGB | rgb(74, 55, 131) |
| HSL | hsl(255, 41%, 36%) |
| OKLCH | oklch(39.9% 0.123 291.4) |
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 #4A3783 | 9.69:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #4A3783 | 2.16:1 | Fails | Lc 11.7 | Not readable |
| #4A3783 text on white | 9.69:1 | AAA | Lc 92.2 | Preferred for body text |
| #4A3783 text on black | 2.16:1 | Fails | Lc -10.2 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E9E7FB
oklch(93.5% 0.027 290.5)
-
Step 200
200
#D9D4F9
oklch(88.6% 0.051 291.5)
-
Step 300
300
#C1B6F8
oklch(80.9% 0.093 291.8)
-
Step 400
400
#A28EF4
oklch(70.7% 0.147 291.2)
-
Step 500
500
#8E6EF0
oklch(63.2% 0.188 291.4)
-
Step 600
600
#7951DE
oklch(55.5% 0.204 291.4)
-
Step 700
700
#6641C1
oklch(49.1% 0.189 291.1)
-
Step 800
800
#53369C
oklch(42.6% 0.158 291.3)
-
Step 900
900 (this color)
#4A3783
oklch(39.9% 0.123 291.4)
-
Step 950
950
#281D49
oklch(27% 0.079 291.8)
#4A3783 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) | #0D4686 | 0.075 |
| Deuteranopia (no green cones) | #134381 | 0.072 |
| Tritanopia (no blue cones) | #3A4757 | 0.099 |
| Achromatopsia (no color) | #444444 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4A3783
#4A3783
oklch(39.9% 0.123 291.4)
- #4A4B00
#4A4B00
oklch(39.9% 0.087 110.6)
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 #4A3783, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.019
- Blueberry #464196 ΔE 0.038
- Rebecca Purple #663399 ΔE 0.063
- Cobalt #1E488F ΔE 0.069
- Twilight #4E518B ΔE 0.070
- Twilight Blue #0A437A ΔE 0.080
- Dusk #4E5481 ΔE 0.082
- Dusk Blue #26538D ΔE 0.083
Use #4A3783 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.