#511B33
Closest named color: Burgundy (#610023). oklch(31.4% 0.086 355.5), rgb(81, 27, 51).
Aa
White text reads best on this color (13.50:1).
About this color
#511B33 is a dark, moderately saturated red. In OKLCH its lightness is 31%, its chroma 0.086 and its hue 356°. Its hue sits on the warm side of the wheel. The nearest named color is Burgundy (#610023), ΔE 0.048 away. White text reads best on it, at 13.50:1.
| Hue family | Reds |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.086) |
| Temperature | warm |
| Nearest name | Burgundy (#610023) |
| Black text | 1.55:1 |
| White text | 13.50:1 |
Values
| HEX | #511B33 |
| RGB | rgb(81, 27, 51) |
| HSL | hsl(333, 50%, 21%) |
| OKLCH | oklch(31.4% 0.086 355.5) |
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 #511B33 | 13.50:1 | AAA | Lc -102.7 | Preferred for body text |
| Black text on #511B33 | 1.55:1 | Fails | Lc 0.0 | Not readable |
| #511B33 text on white | 13.50:1 | AAA | Lc 99.5 | Preferred for body text |
| #511B33 text on black | 1.55:1 | 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 950.
-
Step 50
50
#FEF2F6
oklch(97.2% 0.014 355)
-
Step 100
100
#FBE2EB
oklch(93.6% 0.03 353.9)
-
Step 200
200
#F9CADB
oklch(88.5% 0.057 354.7)
-
Step 300
300
#F5A5C3
oklch(80.8% 0.101 355.5)
-
Step 400
400
#EC70A5
oklch(70.6% 0.163 355.2)
-
Step 500
500
#E2418E
oklch(63% 0.207 355.6)
-
Step 600
600
#CD0879
oklch(55.6% 0.225 355.3)
-
Step 700
700
#AF0065
oklch(49.2% 0.201 355.8)
-
Step 800
800
#900353
oklch(42.8% 0.173 355.5)
-
Step 900
900
#741544
oklch(37.8% 0.135 356)
-
Step 950
950 (this color)
#511B33
oklch(31.4% 0.086 355.5)
#511B33 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) | #242834 | 0.094 |
| Deuteranopia (no green cones) | #323232 | 0.086 |
| Tritanopia (no blue cones) | #581724 | 0.029 |
| Achromatopsia (no color) | #2E2E2E | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #511B33
#511B33
oklch(31.4% 0.086 355.5)
- #003B30
#003B30
oklch(31.5% 0.059 175.5)
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 #511B33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burgundy #610023 ΔE 0.048
- Grape Purple #5D1451 ΔE 0.061
- Claret #680018 ΔE 0.064
- Deep Violet #490648 ΔE 0.066
- Eggplant Purple #430541 ΔE 0.068
- Aubergine #3D0734 ΔE 0.069
- Dark Plum #3F012C ΔE 0.072
- Plum Purple #4E0550 ΔE 0.072
Use #511B33 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.