#503D8F
Closest named color: Dark Slate Blue (#483D8B). oklch(42.5% 0.13 290.4), rgb(80, 61, 143).
Aa
White text reads best on this color (8.73:1).
About this color
#503D8F is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.130 and its hue 290°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.015 away. White text reads best on it, at 8.73:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.130) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.40:1 |
| White text | 8.73:1 |
Values
| HEX | #503D8F |
| RGB | rgb(80, 61, 143) |
| HSL | hsl(254, 40%, 40%) |
| OKLCH | oklch(42.5% 0.13 290.4) |
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 #503D8F | 8.73:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #503D8F | 2.40:1 | Fails | Lc 14.3 | Not readable |
| #503D8F text on white | 8.73:1 | AAA | Lc 89.6 | Fine for body text |
| #503D8F text on black | 2.40:1 | Fails | Lc -12.6 | 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
#E9E8F8
oklch(93.6% 0.021 288.9)
-
Step 200
200
#D8D5F4
oklch(88.5% 0.042 289.9)
-
Step 300
300
#C0B9EF
oklch(81% 0.076 290.5)
-
Step 400
400
#A093E7
oklch(70.8% 0.121 290)
-
Step 500
500
#8B75DF
oklch(63.1% 0.155 290.8)
-
Step 600
600
#765BCD
oklch(55.6% 0.169 290.8)
-
Step 700
700
#634AB2
oklch(49.1% 0.158 290.4)
-
Step 800
800 (this color)
#503D8F
oklch(42.5% 0.13 290.4)
-
Step 900
900
#423573
oklch(37.6% 0.103 290.2)
-
Step 950
950
#272043
oklch(27.1% 0.064 290.7)
#503D8F 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) | #104C92 | 0.077 |
| Deuteranopia (no green cones) | #14498D | 0.075 |
| Tritanopia (no blue cones) | #3E4F60 | 0.106 |
| Achromatopsia (no color) | #4B4B4B | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #503D8F
#503D8F
oklch(42.5% 0.13 290.4)
- #515200
#515200
oklch(42.4% 0.093 110.6)
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 #503D8F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.015
- Blueberry #464196 ΔE 0.021
- Rebecca Purple #663399 ΔE 0.047
- Twilight #4E518B ΔE 0.055
- Cobalt #1E488F ΔE 0.068
- Dusk #4E5481 ΔE 0.071
- Dusk Blue #26538D ΔE 0.076
- Denim Blue #3B5B92 ΔE 0.082
Use #503D8F 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.