#421F73
Closest named color: Indigo (#4B0082). oklch(33.9% 0.136 297.7), rgb(66, 31, 115).
Aa
White text reads best on this color (12.53:1).
About this color
#421F73 is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.136 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.045 away. White text reads best on it, at 12.53:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.136) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.67:1 |
| White text | 12.53:1 |
Values
| HEX | #421F73 |
| RGB | rgb(66, 31, 115) |
| HSL | hsl(265, 58%, 29%) |
| OKLCH | oklch(33.9% 0.136 297.7) |
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 #421F73 | 12.53:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #421F73 | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #421F73 text on white | 12.53:1 | AAA | Lc 97.9 | Preferred for body text |
| #421F73 text on black | 1.67:1 | Fails | Lc 0.0 | 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
#F6F4FE
oklch(97.2% 0.013 295.3)
-
Step 100
100
#ECE6FC
oklch(93.6% 0.03 298.3)
-
Step 200
200
#DDD2FB
oklch(88.6% 0.057 297.5)
-
Step 300
300
#C8B3FA
oklch(80.9% 0.101 297.7)
-
Step 400
400
#AD87F8
oklch(70.6% 0.163 297.6)
-
Step 500
500
#9B64F5
oklch(63.2% 0.208 297.6)
-
Step 600
600
#8744E3
oklch(55.6% 0.226 297.8)
-
Step 700
700
#7334C5
oklch(49.1% 0.21 297.9)
-
Step 800
800
#5D2DA0
oklch(42.7% 0.175 297.5)
-
Step 900
900 (this color)
#421F73
oklch(33.9% 0.136 297.7)
-
Step 950
950
#2C1A4A
oklch(27% 0.086 297.6)
#421F73 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) | #003475 | 0.090 |
| Deuteranopia (no green cones) | #003371 | 0.090 |
| Tritanopia (no blue cones) | #363446 | 0.105 |
| Achromatopsia (no color) | #343434 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #421F73
#421F73
oklch(33.9% 0.136 297.7)
- #353D00
#353D00
oklch(34.1% 0.079 117.7)
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 #421F73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.045
- Royal Purple #4B006E ΔE 0.045
- Plum Purple #4E0550 ΔE 0.077
- Midnight Blue #191970 ΔE 0.079
- Dark Slate Blue #483D8B ΔE 0.081
- Grape Purple #5D1451 ΔE 0.086
- Deep Violet #490648 ΔE 0.087
- Imperial Purple #480CA8 ΔE 0.090
Use #421F73 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.