#4F438B
Closest named color: Dark Slate Blue (#483D8B). oklch(43.2% 0.115 288.3), rgb(79, 67, 139).
Aa
White text reads best on this color (8.37:1).
About this color
#4F438B is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.115 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.021 away. White text reads best on it, at 8.37:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.50:1 |
| White text | 8.37:1 |
Values
| HEX | #4F438B |
| RGB | rgb(79, 67, 139) |
| HSL | hsl(250, 35%, 40%) |
| OKLCH | oklch(43.2% 0.115 288.3) |
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 #4F438B | 8.37:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #4F438B | 2.50:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #4F438B text on white | 8.37:1 | AAA | Lc 88.7 | Fine for body text |
| #4F438B text on black | 2.50:1 | Fails | Lc -13.5 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E9E8F7
oklch(93.6% 0.02 289.1)
-
Step 200
200
#D7D6F1
oklch(88.5% 0.037 287.3)
-
Step 300
300
#BEBAEA
oklch(80.8% 0.067 288.6)
-
Step 400
400
#9D95E0
oklch(70.6% 0.108 288.2)
-
Step 500
500
#877AD7
oklch(63.2% 0.137 288.2)
-
Step 600
600
#7161C4
oklch(55.6% 0.149 288)
-
Step 700
700
#5F4FAA
oklch(49% 0.14 288.2)
-
Step 800
800 (this color)
#4F438B
oklch(43.2% 0.115 288.3)
-
Step 900
900
#40386E
oklch(37.7% 0.09 288.1)
-
Step 950
950
#252140
oklch(26.9% 0.057 287.9)
#4F438B 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) | #254F8E | 0.059 |
| Deuteranopia (no green cones) | #254C89 | 0.058 |
| Tritanopia (no blue cones) | #3E5260 | 0.097 |
| Achromatopsia (no color) | #4E4E4E | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F438B
#4F438B
oklch(43.2% 0.115 288.3)
- #555400
#555400
oklch(43.3% 0.094 109)
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 #4F438B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.021
- Blueberry #464196 ΔE 0.025
- Twilight #4E518B ΔE 0.038
- Dusk #4E5481 ΔE 0.053
- Rebecca Purple #663399 ΔE 0.058
- Cobalt #1E488F ΔE 0.062
- Dusk Blue #26538D ΔE 0.063
- Denim Blue #3B5B92 ΔE 0.068
Use #4F438B 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.