#503B6B
Closest named color: Dark Slate Blue (#483D8B). oklch(39.7% 0.082 303), rgb(80, 59, 107).
Aa
White text reads best on this color (9.63:1).
About this color
#503B6B is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.082 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.055 away. White text reads best on it, at 9.63:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.082) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.17:1 |
| White text | 9.63:1 |
Values
| HEX | #503B6B |
| RGB | rgb(80, 59, 107) |
| HSL | hsl(266, 29%, 33%) |
| OKLCH | oklch(39.7% 0.082 303) |
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 #503B6B | 9.63:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #503B6B | 2.17:1 | Fails | Lc 11.7 | Not readable |
| #503B6B text on white | 9.63:1 | AAA | Lc 92.2 | Preferred for body text |
| #503B6B text on black | 2.17:1 | Fails | Lc -10.2 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#ECE7F4
oklch(93.6% 0.018 303.4)
-
Step 200
200
#DDD4EC
oklch(88.4% 0.034 302.7)
-
Step 300
300
#C8B8E2
oklch(81% 0.061 302.4)
-
Step 400
400
#AD92D3
oklch(70.8% 0.097 303)
-
Step 500
500
#9975C8
oklch(63.1% 0.126 302.9)
-
Step 600
600
#845CB4
oklch(55.5% 0.137 303.2)
-
Step 700
700
#704C9B
oklch(49.2% 0.126 303.1)
-
Step 800
800
#5B3E7E
oklch(42.7% 0.106 303.1)
-
Step 900
900 (this color)
#503B6B
oklch(39.7% 0.082 303)
-
Step 950
950
#2C203B
oklch(27.1% 0.051 303.6)
#503B6B 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) | #2F446D | 0.055 |
| Deuteranopia (no green cones) | #33456A | 0.052 |
| Tritanopia (no blue cones) | #4B434E | 0.062 |
| Achromatopsia (no color) | #454545 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #503B6B
#503B6B
oklch(39.7% 0.082 303)
- #3F4E15
#3F4E15
oklch(39.8% 0.082 122.9)
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 #503B6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.055
- Dusk #4E5481 ΔE 0.073
- Twilight #4E518B ΔE 0.073
- Blueberry #464196 ΔE 0.073
- Dark Grey Blue #29465B ΔE 0.075
- Dusty Grape #545775 ΔE 0.081
- Purple Brown #673A3F ΔE 0.085
- Twilight Blue #0A437A ΔE 0.086
Use #503B6B 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.