#501D91
Closest named color: Indigo (#4B0082). oklch(38.1% 0.174 297.1), rgb(80, 29, 145).
Aa
White text reads best on this color (10.90:1).
About this color
#501D91 is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.174 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.044 away. White text reads best on it, at 10.90:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.174) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.92:1 |
| White text | 10.90:1 |
Values
| HEX | #501D91 |
| RGB | rgb(80, 29, 145) |
| HSL | hsl(266, 67%, 34%) |
| OKLCH | oklch(38.1% 0.174 297.1) |
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 #501D91 | 10.90:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #501D91 | 1.92:1 | Fails | Lc 9.7 | Not readable |
| #501D91 text on white | 10.90:1 | AAA | Lc 94.3 | Preferred for body text |
| #501D91 text on black | 1.92:1 | Fails | Lc -8.3 | 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
#F6F3FF
oklch(97% 0.016 297.5)
-
Step 100
100
#ECE5FF
oklch(93.5% 0.036 298)
-
Step 200
200
#DDD1FF
oklch(88.5% 0.064 297)
-
Step 300
300
#C8B2FF
oklch(81% 0.109 297)
-
Step 400
400
#AE85FF
oklch(70.8% 0.175 297.2)
-
Step 500
500
#9C5EFF
oklch(63.1% 0.228 297.1)
-
Step 600
600
#8C22FF
oklch(55.6% 0.283 296.9)
-
Step 700
700
#7800E0
oklch(49.1% 0.266 297)
-
Step 800
800
#620DB6
oklch(42.7% 0.223 297.3)
-
Step 900
900 (this color)
#501D91
oklch(38.1% 0.174 297.1)
-
Step 950
950
#2E1354
oklch(26.9% 0.111 297.4)
#501D91 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) | #003D94 | 0.107 |
| Deuteranopia (no green cones) | #003B8F | 0.107 |
| Tritanopia (no blue cones) | #3F3D57 | 0.131 |
| Achromatopsia (no color) | #3D3D3D | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #501D91
#501D91
oklch(38.1% 0.174 297.1)
- #404800
#404800
oklch(38.1% 0.088 116.7)
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 #501D91, closest first.
No curated palette has a color within ΔE 0.04 of #501D91.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.044
- Imperial Purple #480CA8 ΔE 0.046
- Chrysanthemum #560BAD ΔE 0.047
- Rebecca Purple #663399 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.066
- Indigo Blue #3A18B1 ΔE 0.071
- Royal Purple #4B006E ΔE 0.073
- Blueberry #464196 ΔE 0.074
Use #501D91 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.