#51217F
Closest named color: Indigo (#4B0082). oklch(37% 0.15 303), rgb(81, 33, 127).
Aa
White text reads best on this color (11.20:1).
About this color
#51217F is a dark, vivid purple. In OKLCH its lightness is 37%, its chroma 0.150 and its hue 303°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.043 away. White text reads best on it, at 11.20:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | vivid (0.150) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.87:1 |
| White text | 11.20:1 |
Values
| HEX | #51217F |
| RGB | rgb(81, 33, 127) |
| HSL | hsl(271, 59%, 31%) |
| OKLCH | oklch(37% 0.15 303) |
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 #51217F | 11.20:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #51217F | 1.87:1 | Fails | Lc 8.7 | Not readable |
| #51217F text on white | 11.20:1 | AAA | Lc 95.2 | Preferred for body text |
| #51217F text on black | 1.87:1 | Fails | Lc -7.5 | 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
#E1D0FC
oklch(88.5% 0.062 302.7)
-
Step 300
300
#CFAFFD
oklch(80.9% 0.113 302.8)
-
Step 400
400
#B880FB
oklch(70.7% 0.18 303.1)
-
Step 500
500
#A758F9
oklch(63.1% 0.231 302.8)
-
Step 600
600
#9333E7
oklch(55.5% 0.25 302.9)
-
Step 700
700
#7E22C9
oklch(49.1% 0.232 303.1)
-
Step 800
800
#6621A3
oklch(42.8% 0.192 302.8)
-
Step 900
900 (this color)
#51217F
oklch(37% 0.15 303)
-
Step 950
950
#30164C
oklch(26.9% 0.096 302.5)
#51217F 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) | #003A82 | 0.110 |
| Deuteranopia (no green cones) | #003B7D | 0.112 |
| Tritanopia (no blue cones) | #48384E | 0.109 |
| Achromatopsia (no color) | #3B3B3B | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51217F
#51217F
oklch(37% 0.15 303)
- #374700
#374700
oklch(37% 0.091 123)
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 #51217F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.043
- Royal Purple #4B006E ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.065
- Rebecca Purple #663399 ΔE 0.071
- Imperial Purple #480CA8 ΔE 0.075
- Chrysanthemum #560BAD ΔE 0.078
- Blueberry #464196 ΔE 0.080
- Grape Purple #5D1451 ΔE 0.086
Use #51217F 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.