#551E72
Closest named color: Royal Purple (#4B006E). oklch(36.2% 0.141 311.3), rgb(85, 30, 114).
Aa
White text reads best on this color (11.57:1).
About this color
#551E72 is a dark, vivid purple. In OKLCH its lightness is 36%, its chroma 0.141 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Royal Purple (#4B006E), ΔE 0.048 away. White text reads best on it, at 11.57:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | vivid (0.141) |
| Temperature | in between |
| Nearest name | Royal Purple (#4B006E) |
| Black text | 1.81:1 |
| White text | 11.57:1 |
Values
| HEX | #551E72 |
| RGB | rgb(85, 30, 114) |
| HSL | hsl(279, 58%, 28%) |
| OKLCH | oklch(36.2% 0.141 311.3) |
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 #551E72 | 11.57:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #551E72 | 1.81:1 | Fails | Lc 8.0 | Not readable |
| #551E72 text on white | 11.57:1 | AAA | Lc 95.9 | Preferred for body text |
| #551E72 text on black | 1.81:1 | 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
#F9F3FD
oklch(97.2% 0.015 312.2)
-
Step 100
100
#F1E4F9
oklch(93.5% 0.031 312.9)
-
Step 200
200
#E6CFF6
oklch(88.6% 0.058 311.5)
-
Step 300
300
#D7ADF3
oklch(80.9% 0.106 311.4)
-
Step 400
400
#C27EED
oklch(70.6% 0.17 311)
-
Step 500
500
#B357E6
oklch(63.1% 0.215 311.4)
-
Step 600
600
#9F34D4
oklch(55.6% 0.234 311.5)
-
Step 700
700
#8823B8
oklch(49.1% 0.219 311.4)
-
Step 800
800
#6E2195
oklch(42.7% 0.181 311.2)
-
Step 900
900 (this color)
#551E72
oklch(36.2% 0.141 311.3)
-
Step 950
950
#341645
oklch(26.9% 0.088 311.3)
#551E72 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) | #003674 | 0.123 |
| Deuteranopia (no green cones) | #123A70 | 0.116 |
| Tritanopia (no blue cones) | #513046 | 0.094 |
| Achromatopsia (no color) | #393939 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #551E72
#551E72
oklch(36.2% 0.141 311.3)
- #2A4700
#2A4700
oklch(36.1% 0.099 131)
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 #551E72, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Purple #4B006E ΔE 0.048
- Indigo #4B0082 ΔE 0.052
- Grape Purple #5D1451 ΔE 0.061
- Plum Purple #4E0550 ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.080
- Rich Purple #720058 ΔE 0.081
- Rebecca Purple #663399 ΔE 0.084
- Deep Violet #490648 ΔE 0.085
Use #551E72 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.