#4A378B
Closest named color: Dark Slate Blue (#483D8B). oklch(40.5% 0.134 289.5), rgb(74, 55, 139).
Aa
White text reads best on this color (9.50:1).
About this color
#4A378B is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.134 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.015 away. White text reads best on it, at 9.50:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.21:1 |
| White text | 9.50:1 |
Values
| HEX | #4A378B |
| RGB | rgb(74, 55, 139) |
| HSL | hsl(254, 43%, 38%) |
| OKLCH | oklch(40.5% 0.134 289.5) |
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 #4A378B | 9.50:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #4A378B | 2.21:1 | Fails | Lc 12.3 | Not readable |
| #4A378B text on white | 9.50:1 | AAA | Lc 91.7 | Preferred for body text |
| #4A378B text on black | 2.21:1 | Fails | Lc -10.7 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F8
oklch(93.6% 0.021 288.9)
-
Step 200
200
#D8D5F5
oklch(88.5% 0.044 289.8)
-
Step 300
300
#BFB9F0
oklch(80.9% 0.077 289.6)
-
Step 400
400
#9F92E9
oklch(70.6% 0.126 289.6)
-
Step 500
500
#8975E2
oklch(63.1% 0.159 289.5)
-
Step 600
600
#745BD0
oklch(55.6% 0.173 289.4)
-
Step 700
700
#624AB4
oklch(49.1% 0.161 289.6)
-
Step 800
800 (this color)
#4A378B
oklch(40.5% 0.134 289.5)
-
Step 900
900
#423574
oklch(37.7% 0.104 290)
-
Step 950
950
#262044
oklch(27% 0.065 288.9)
#4A378B 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) | #00478E | 0.079 |
| Deuteranopia (no green cones) | #004489 | 0.079 |
| Tritanopia (no blue cones) | #364A5B | 0.110 |
| Achromatopsia (no color) | #464646 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4A378B
#4A378B
oklch(40.5% 0.134 289.5)
- #4D4C00
#4D4C00
oklch(40.4% 0.088 108.9)
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 #4A378B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.015
- Blueberry #464196 ΔE 0.029
- Rebecca Purple #663399 ΔE 0.056
- Cobalt #1E488F ΔE 0.067
- Twilight #4E518B ΔE 0.070
- Sapphire #2138AB ΔE 0.078
- Imperial Purple #480CA8 ΔE 0.079
- Dusk Blue #26538D ΔE 0.082
Use #4A378B 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.