#503D90
Closest named color: Dark Slate Blue (#483D8B). oklch(42.5% 0.132 290.2), rgb(80, 61, 144).
Aa
White text reads best on this color (8.70:1).
About this color
#503D90 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.132 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 0.016 away. White text reads best on it, at 8.70:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.132) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.41:1 |
| White text | 8.70:1 |
Values
| HEX | #503D90 |
| RGB | rgb(80, 61, 144) |
| HSL | hsl(254, 40%, 40%) |
| OKLCH | oklch(42.5% 0.132 290.2) |
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 #503D90 | 8.70:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #503D90 | 2.41:1 | Fails | Lc 14.4 | Not readable |
| #503D90 text on white | 8.70:1 | AAA | Lc 89.6 | Fine for body text |
| #503D90 text on black | 2.41:1 | Fails | Lc -12.7 | 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
#BFB9EF
oklch(80.9% 0.076 289.7)
-
Step 400
400
#A092E8
oklch(70.6% 0.124 290.3)
-
Step 500
500
#8A75E0
oklch(63% 0.157 290.2)
-
Step 600
600
#755BCE
oklch(55.6% 0.171 290.1)
-
Step 700
700
#634AB2
oklch(49.1% 0.158 290.4)
-
Step 800
800 (this color)
#503D90
oklch(42.5% 0.132 290.2)
-
Step 900
900
#423573
oklch(37.6% 0.103 290.2)
-
Step 950
950
#272044
oklch(27.1% 0.065 290.3)
#503D90 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) | #0D4D93 | 0.079 |
| Deuteranopia (no green cones) | #12498E | 0.076 |
| Tritanopia (no blue cones) | #3D4F60 | 0.108 |
| Achromatopsia (no color) | #4B4B4B | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #503D90
#503D90
oklch(42.5% 0.132 290.2)
- #525200
#525200
oklch(42.5% 0.093 109.8)
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 #503D90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.016
- Blueberry #464196 ΔE 0.020
- Rebecca Purple #663399 ΔE 0.046
- Twilight #4E518B ΔE 0.055
- Cobalt #1E488F ΔE 0.068
- Dusk #4E5481 ΔE 0.071
- Dusk Blue #26538D ΔE 0.076
- Sapphire #2138AB ΔE 0.082
Use #503D90 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.