#4F377B
Closest named color: Dark Slate Blue (#483D8B). oklch(39.9% 0.112 297.4), rgb(79, 55, 123).
Aa
White text reads best on this color (9.70:1).
About this color
#4F377B is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.112 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.031 away. White text reads best on it, at 9.70:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.112) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.16:1 |
| White text | 9.70:1 |
Values
| HEX | #4F377B |
| RGB | rgb(79, 55, 123) |
| HSL | hsl(261, 38%, 35%) |
| OKLCH | oklch(39.9% 0.112 297.4) |
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 #4F377B | 9.70:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #4F377B | 2.16:1 | Fails | Lc 11.7 | Not readable |
| #4F377B text on white | 9.70:1 | AAA | Lc 92.3 | Preferred for body text |
| #4F377B 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EBE7F9
oklch(93.6% 0.024 296.1)
-
Step 200
200
#DCD3F5
oklch(88.5% 0.047 297.5)
-
Step 300
300
#C6B6F1
oklch(81% 0.084 296.9)
-
Step 400
400
#AA8DE9
oklch(70.6% 0.134 297.4)
-
Step 500
500
#976EE2
oklch(63.1% 0.17 297.6)
-
Step 600
600
#8252D0
oklch(55.5% 0.187 297.5)
-
Step 700
700
#6E42B4
oklch(49.1% 0.173 297.4)
-
Step 800
800
#5A3792
oklch(42.7% 0.144 297.7)
-
Step 900
900 (this color)
#4F377B
oklch(39.9% 0.112 297.4)
-
Step 950
950
#2B1D44
oklch(27% 0.071 298)
#4F377B 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) | #1C447D | 0.075 |
| Deuteranopia (no green cones) | #234479 | 0.070 |
| Tritanopia (no blue cones) | #454553 | 0.089 |
| Achromatopsia (no color) | #444444 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F377B
#4F377B
oklch(39.9% 0.112 297.4)
- #444D00
#444D00
oklch(39.8% 0.092 117.2)
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 #4F377B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.031
- Blueberry #464196 ΔE 0.050
- Rebecca Purple #663399 ΔE 0.065
- Twilight #4E518B ΔE 0.071
- Cobalt #1E488F ΔE 0.079
- Dusk #4E5481 ΔE 0.079
- Twilight Blue #0A437A ΔE 0.085
- Dusk Blue #26538D ΔE 0.089
Use #4F377B 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.