#4F3788
Closest named color: Dark Slate Blue (#483D8B). oklch(40.8% 0.13 293.5), rgb(79, 55, 136).
Aa
White text reads best on this color (9.39:1).
About this color
#4F3788 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.130 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.018 away. White text reads best on it, at 9.39:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.130) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.23:1 |
| White text | 9.39:1 |
Values
| HEX | #4F3788 |
| RGB | rgb(79, 55, 136) |
| HSL | hsl(258, 42%, 37%) |
| OKLCH | oklch(40.8% 0.13 293.5) |
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 #4F3788 | 9.39:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #4F3788 | 2.23:1 | Fails | Lc 12.6 | Not readable |
| #4F3788 text on white | 9.39:1 | AAA | Lc 91.4 | Preferred for body text |
| #4F3788 text on black | 2.23:1 | Fails | Lc -11.0 | 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
#EAE7F8
oklch(93.5% 0.023 294.1)
-
Step 200
200
#DAD4F3
oklch(88.4% 0.043 294.4)
-
Step 300
300
#C2B8EE
oklch(80.9% 0.076 293.1)
-
Step 400
400
#A491E5
oklch(70.6% 0.122 293.4)
-
Step 500
500
#8F74DD
oklch(63.1% 0.154 293.3)
-
Step 600
600
#7A5ACB
oklch(55.6% 0.168 293.2)
-
Step 700
700
#6749AF
oklch(49.1% 0.156 293.4)
-
Step 800
800 (this color)
#4F3788
oklch(40.8% 0.13 293.5)
-
Step 900
900
#453571
oklch(37.8% 0.1 293.3)
-
Step 950
950
#281F42
oklch(26.9% 0.064 293.5)
#4F3788 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) | #06478B | 0.085 |
| Deuteranopia (no green cones) | #114586 | 0.081 |
| Tritanopia (no blue cones) | #40495A | 0.104 |
| Achromatopsia (no color) | #464646 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F3788
#4F3788
oklch(40.8% 0.13 293.5)
- #4A4F00
#4A4F00
oklch(40.9% 0.092 113.9)
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 #4F3788, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.018
- Blueberry #464196 ΔE 0.034
- Rebecca Purple #663399 ΔE 0.051
- Twilight #4E518B ΔE 0.068
- Cobalt #1E488F ΔE 0.074
- Dusk #4E5481 ΔE 0.082
- Imperial Purple #480CA8 ΔE 0.085
- Chrysanthemum #560BAD ΔE 0.086
Use #4F3788 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.