#51227C
Closest named color: Indigo (#4B0082). oklch(36.9% 0.145 303.9), rgb(81, 34, 124).
Aa
White text reads best on this color (11.23:1).
About this color
#51227C is a dark, vivid purple. In OKLCH its lightness is 37%, its chroma 0.145 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.046 away. White text reads best on it, at 11.23:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | vivid (0.145) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.86:1 |
| White text | 11.23:1 |
Values
| HEX | #51227C |
| RGB | rgb(81, 34, 124) |
| HSL | hsl(271, 57%, 31%) |
| OKLCH | oklch(36.9% 0.145 303.9) |
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 #51227C | 11.23:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #51227C | 1.86:1 | Fails | Lc 8.6 | Not readable |
| #51227C text on white | 11.23:1 | AAA | Lc 95.3 | Preferred for body text |
| #51227C text on black | 1.86:1 | Fails | Lc -7.4 | 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
#D0AFFA
oklch(80.9% 0.109 304.2)
-
Step 400
400
#B981F8
oklch(70.8% 0.175 304)
-
Step 500
500
#A85AF4
oklch(63.1% 0.223 304)
-
Step 600
600
#9437E3
oklch(55.7% 0.242 303.8)
-
Step 700
700
#7E26C5
oklch(49.1% 0.225 303.8)
-
Step 800
800
#66239F
oklch(42.6% 0.186 303.8)
-
Step 900
900 (this color)
#51227C
oklch(36.9% 0.145 303.9)
-
Step 950
950
#31174A
oklch(27.1% 0.092 304.4)
#51227C 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) | #003A7F | 0.110 |
| Deuteranopia (no green cones) | #003B7A | 0.112 |
| Tritanopia (no blue cones) | #49374C | 0.106 |
| Achromatopsia (no color) | #3B3B3B | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51227C
#51227C
oklch(36.9% 0.145 303.9)
- #364700
#364700
oklch(37% 0.091 123.7)
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 #51227C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.046
- Royal Purple #4B006E ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.065
- Rebecca Purple #663399 ΔE 0.073
- Imperial Purple #480CA8 ΔE 0.081
- Blueberry #464196 ΔE 0.081
- Grape Purple #5D1451 ΔE 0.081
- Chrysanthemum #560BAD ΔE 0.083
Use #51227C 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.