#504B77
Closest named color: Dusk (#4E5481). oklch(43.7% 0.072 288.3), rgb(80, 75, 119).
Aa
White text reads best on this color (8.03:1).
About this color
#504B77 is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.072 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.027 away. White text reads best on it, at 8.03:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.61:1 |
| White text | 8.03:1 |
Values
| HEX | #504B77 |
| RGB | rgb(80, 75, 119) |
| HSL | hsl(247, 23%, 38%) |
| OKLCH | oklch(43.7% 0.072 288.3) |
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 #504B77 | 8.03:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #504B77 | 2.61:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #504B77 text on white | 8.03:1 | AAA | Lc 87.8 | Fine for body text |
| #504B77 text on black | 2.61:1 | Fails | Lc -14.4 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E9E9F2
oklch(93.7% 0.012 286.2)
-
Step 200
200
#D8D7E8
oklch(88.5% 0.023 288.6)
-
Step 300
300
#BFBDDB
oklch(81% 0.042 288.5)
-
Step 400
400
#9E9AC9
oklch(70.6% 0.068 288.4)
-
Step 500
500
#8781BB
oklch(63.1% 0.086 288.4)
-
Step 600
600
#716AA7
oklch(55.6% 0.093 288.2)
-
Step 700
700
#5F588F
oklch(49.1% 0.087 288.6)
-
Step 800
800 (this color)
#504B77
oklch(43.7% 0.072 288.3)
-
Step 900
900
#403D5E
oklch(37.8% 0.056 287.6)
-
Step 950
950
#262437
oklch(27.1% 0.035 288.7)
#504B77 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) | #3E5179 | 0.030 |
| Deuteranopia (no green cones) | #3E4F76 | 0.028 |
| Tritanopia (no blue cones) | #47535B | 0.061 |
| Achromatopsia (no color) | #505050 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #504B77
#504B77
oklch(43.7% 0.072 288.3)
- #555522
#555522
oklch(43.8% 0.072 109)
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 #504B77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.027
- Twilight #4E518B ΔE 0.034
- Dusty Grape #545775 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.048
- Dark Slate Blue #483D8B ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.060
- Dusk Blue #26538D ΔE 0.061
Use #504B77 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.