#503C78
Closest named color: Dark Slate Blue (#483D8B). oklch(40.7% 0.099 297.2), rgb(80, 60, 120).
Aa
White text reads best on this color (9.29:1).
About this color
#503C78 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.099 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 0.034 away. White text reads best on it, at 9.29:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.099) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.25:1 |
| White text | 9.29:1 |
Values
| HEX | #503C78 |
| RGB | rgb(80, 60, 120) |
| HSL | hsl(260, 33%, 35%) |
| OKLCH | oklch(40.7% 0.099 297.2) |
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 #503C78 | 9.29:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #503C78 | 2.25:1 | Fails | Lc 12.7 | Not readable |
| #503C78 text on white | 9.29:1 | AAA | Lc 91.3 | Preferred for body text |
| #503C78 text on black | 2.25:1 | Fails | Lc -11.1 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#EBE8F4
oklch(93.7% 0.016 297.5)
-
Step 200
200
#DBD5EC
oklch(88.5% 0.032 297.7)
-
Step 300
300
#C4B9E2
oklch(80.8% 0.058 297.4)
-
Step 400
400
#A794D4
oklch(70.7% 0.094 297.6)
-
Step 500
500
#9179C8
oklch(63.1% 0.118 296.9)
-
Step 600
600
#7C61B5
oklch(55.7% 0.129 296.8)
-
Step 700
700
#694F9B
oklch(49% 0.12 297.6)
-
Step 800
800 (this color)
#503C78
oklch(40.7% 0.099 297.2)
-
Step 900
900
#463865
oklch(37.7% 0.076 296.9)
-
Step 950
950
#29213B
oklch(27% 0.048 297.2)
#503C78 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) | #28477A | 0.062 |
| Deuteranopia (no green cones) | #2C4677 | 0.058 |
| Tritanopia (no blue cones) | #474754 | 0.078 |
| Achromatopsia (no color) | #474747 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #503C78
#503C78
oklch(40.7% 0.099 297.2)
- #465000
#465000
oklch(40.8% 0.095 117.7)
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 #503C78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.034
- Blueberry #464196 ΔE 0.052
- Twilight #4E518B ΔE 0.060
- Dusk #4E5481 ΔE 0.066
- Rebecca Purple #663399 ΔE 0.071
- Cobalt #1E488F ΔE 0.077
- Dusty Grape #545775 ΔE 0.080
- Dusk Blue #26538D ΔE 0.081
Use #503C78 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.