#551057
Closest named color: Grape Purple (#5D1451). oklch(32.8% 0.132 326.8), rgb(85, 16, 87).
Aa
White text reads best on this color (13.14:1).
About this color
#551057 is a dark, moderately saturated purple. In OKLCH its lightness is 33%, its chroma 0.132 and its hue 327°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grape Purple (#5D1451), ΔE 0.024 away. White text reads best on it, at 13.14:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.132) |
| Temperature | in between |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 1.59:1 |
| White text | 13.14:1 |
Values
| HEX | #551057 |
| RGB | rgb(85, 16, 87) |
| HSL | hsl(298, 69%, 20%) |
| OKLCH | oklch(32.8% 0.132 326.8) |
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 #551057 | 13.14:1 | AAA | Lc -101.9 | Preferred for body text |
| Black text on #551057 | 1.59:1 | Fails | Lc 0.0 | Not readable |
| #551057 text on white | 13.14:1 | AAA | Lc 98.5 | Preferred for body text |
| #551057 text on black | 1.59:1 | 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
#FAF2FA
oklch(97% 0.014 325.7)
-
Step 100
100
#F5E4F4
oklch(93.7% 0.028 327.6)
-
Step 200
200
#EDCDEC
oklch(88.4% 0.054 327)
-
Step 300
300
#E3AAE2
oklch(80.8% 0.099 327)
-
Step 400
400
#D37AD4
oklch(70.7% 0.159 326.7)
-
Step 500
500
#C552C8
oklch(63% 0.202 326.6)
-
Step 600
600
#B12FB4
oklch(55.6% 0.219 327.1)
-
Step 700
700
#981F9B
oklch(49.2% 0.204 327)
-
Step 800
800
#7B1D7E
oklch(42.6% 0.17 326.7)
-
Step 900
900 (this color)
#551057
oklch(32.8% 0.132 326.8)
-
Step 950
950
#3B143B
oklch(27% 0.084 327.6)
#551057 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) | #002B59 | 0.142 |
| Deuteranopia (no green cones) | #223355 | 0.119 |
| Tritanopia (no blue cones) | #581C33 | 0.074 |
| Achromatopsia (no color) | #303030 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #551057
#551057
oklch(32.8% 0.132 326.8)
- #004112
#004112
oklch(32.7% 0.097 146.9)
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 #551057, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.024
- Plum Purple #4E0550 ΔE 0.025
- Deep Violet #490648 ΔE 0.040
- Royal Purple #4B006E ΔE 0.054
- Eggplant Purple #430541 ΔE 0.059
- Rich Purple #720058 ΔE 0.064
- Velvet #750851 ΔE 0.073
- Indigo #4B0082 ΔE 0.083
Use #551057 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.