#51247D
Closest named color: Indigo (#4B0082). oklch(37.3% 0.144 303.2), rgb(81, 36, 125).
Aa
White text reads best on this color (11.06:1).
About this color
#51247D is a dark, vivid purple. In OKLCH its lightness is 37%, its chroma 0.144 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.049 away. White text reads best on it, at 11.06:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.89:1 |
| White text | 11.06:1 |
Values
| HEX | #51247D |
| RGB | rgb(81, 36, 125) |
| HSL | hsl(270, 55%, 32%) |
| OKLCH | oklch(37.3% 0.144 303.2) |
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 #51247D | 11.06:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #51247D | 1.89:1 | Fails | Lc 9.0 | Not readable |
| #51247D text on white | 11.06:1 | AAA | Lc 95.0 | Preferred for body text |
| #51247D text on black | 1.89:1 | Fails | Lc -7.7 | 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 900.
-
Step 50
50
#F7F3FE
oklch(97% 0.015 302.6)
-
Step 100
100
#EEE5FC
oklch(93.6% 0.032 303.5)
-
Step 200
200
#E1D0FA
oklch(88.5% 0.06 303.6)
-
Step 300
300
#CFB0FA
oklch(81% 0.107 303.3)
-
Step 400
400
#B782F8
oklch(70.7% 0.173 303)
-
Step 500
500
#A65BF4
oklch(63% 0.221 303.1)
-
Step 600
600
#9239E3
oklch(55.6% 0.24 303)
-
Step 700
700
#7D28C5
oklch(49.1% 0.223 303.2)
-
Step 800
800
#65259F
oklch(42.7% 0.184 303)
-
Step 900
900 (this color)
#51247D
oklch(37.3% 0.144 303.2)
-
Step 950
950
#30174A
oklch(26.9% 0.092 303.3)
#51247D 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) | #003B80 | 0.108 |
| Deuteranopia (no green cones) | #003C7B | 0.110 |
| Tritanopia (no blue cones) | #48394D | 0.107 |
| Achromatopsia (no color) | #3C3C3C | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51247D
#51247D
oklch(37.3% 0.144 303.2)
- #374800
#374800
oklch(37.3% 0.092 123.6)
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 #51247D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.049
- Royal Purple #4B006E ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.061
- Rebecca Purple #663399 ΔE 0.070
- Blueberry #464196 ΔE 0.077
- Imperial Purple #480CA8 ΔE 0.080
- Chrysanthemum #560BAD ΔE 0.082
- Grape Purple #5D1451 ΔE 0.083
Use #51247D 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.