#660433
Closest named color: Burgundy (#610023). oklch(33.3% 0.131 0.3), rgb(102, 4, 51).
Aa
White text reads best on this color (12.88:1).
About this color
#660433 is a dark, moderately saturated red. In OKLCH its lightness is 33%, its chroma 0.131 and its hue 0°. Its hue sits on the warm side of the wheel. The nearest named color is Burgundy (#610023), ΔE 0.028 away. White text reads best on it, at 12.88:1.
| Hue family | Reds |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.131) |
| Temperature | warm |
| Nearest name | Burgundy (#610023) |
| Black text | 1.63:1 |
| White text | 12.88:1 |
Values
| HEX | #660433 |
| RGB | rgb(102, 4, 51) |
| HSL | hsl(331, 92%, 21%) |
| OKLCH | oklch(33.3% 0.131 0.3) |
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 #660433 | 12.88:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #660433 | 1.63:1 | Fails | Lc 0.0 | Not readable |
| #660433 text on white | 12.88:1 | AAA | Lc 97.3 | Preferred for body text |
| #660433 text on black | 1.63:1 | 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
#FEF2F5
oklch(97.1% 0.013 0.3)
-
Step 100
100
#FBE2E9
oklch(93.5% 0.029 358.8)
-
Step 200
200
#F9CBD7
oklch(88.5% 0.054 0.8)
-
Step 300
300
#F6A6BE
oklch(80.9% 0.099 0)
-
Step 400
400
#ED729C
oklch(70.7% 0.157 0.4)
-
Step 500
500
#E34484
oklch(63.1% 0.201 0.2)
-
Step 600
600
#CE126D
oklch(55.6% 0.218 0.4)
-
Step 700
700
#B0005B
oklch(49% 0.199 0.4)
-
Step 800
800
#90084B
oklch(42.7% 0.168 0)
-
Step 900
900 (this color)
#660433
oklch(33.3% 0.131 0.3)
-
Step 950
950
#441024
oklch(26.9% 0.082 0.7)
#660433 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) | #202634 | 0.150 |
| Deuteranopia (no green cones) | #3A3831 | 0.132 |
| Tritanopia (no blue cones) | #70001C | 0.044 |
| Achromatopsia (no color) | #323232 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #660433
#660433
oklch(33.3% 0.131 0.3)
- #004037
#004037
oklch(33.3% 0.061 179.6)
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 #660433, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Burgundy #610023 ΔE 0.028
- Merlot #730039 ΔE 0.030
- Claret #680018 ΔE 0.042
- Bordeaux #7B002C ΔE 0.050
- Grape Purple #5D1451 ΔE 0.056
- Wine Red #7B0323 ΔE 0.057
- Velvet #750851 ΔE 0.059
- Wine #80013F ΔE 0.061
Use #660433 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.