#503773
Closest named color: Dark Slate Blue (#483D8B). oklch(39.5% 0.101 301.2), rgb(80, 55, 115).
Aa
White text reads best on this color (9.83:1).
About this color
#503773 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.101 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.043 away. White text reads best on it, at 9.83:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.101) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.13:1 |
| White text | 9.83:1 |
Values
| HEX | #503773 |
| RGB | rgb(80, 55, 115) |
| HSL | hsl(265, 35%, 33%) |
| OKLCH | oklch(39.5% 0.101 301.2) |
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 #503773 | 9.83:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #503773 | 2.13:1 | Fails | Lc 11.3 | Not readable |
| #503773 text on white | 9.83:1 | AAA | Lc 92.6 | Preferred for body text |
| #503773 text on black | 2.13:1 | Fails | Lc -9.8 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#ECE7F7
oklch(93.7% 0.022 300.2)
-
Step 200
200
#DDD3F1
oklch(88.4% 0.042 300.7)
-
Step 300
300
#C9B6EA
oklch(81% 0.075 301.4)
-
Step 400
400
#AE8EE0
oklch(70.7% 0.121 301.3)
-
Step 500
500
#9A70D7
oklch(63.1% 0.154 300.9)
-
Step 600
600
#8555C4
oklch(55.5% 0.168 301)
-
Step 700
700
#7145A9
oklch(49.1% 0.155 301.1)
-
Step 800
800
#5C3989
oklch(42.6% 0.13 301.3)
-
Step 900
900 (this color)
#503773
oklch(39.5% 0.101 301.2)
-
Step 950
950
#2C1E40
oklch(27% 0.063 301.3)
#503773 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) | #244375 | 0.070 |
| Deuteranopia (no green cones) | #2A4372 | 0.064 |
| Tritanopia (no blue cones) | #49424F | 0.078 |
| Achromatopsia (no color) | #434343 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #503773
#503773
oklch(39.5% 0.101 301.2)
- #3F4D00
#3F4D00
oklch(39.4% 0.094 120.9)
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 #503773, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.043
- Blueberry #464196 ΔE 0.062
- Twilight #4E518B ΔE 0.075
- Rebecca Purple #663399 ΔE 0.075
- Dusk #4E5481 ΔE 0.080
- Cobalt #1E488F ΔE 0.085
- Twilight Blue #0A437A ΔE 0.087
- Dark Grey Blue #29465B ΔE 0.088
Use #503773 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.