#66374E
Closest named color: Purple Brown (#673A3F). oklch(40.3% 0.074 350.2), rgb(102, 55, 78).
Aa
White text reads best on this color (9.45:1).
About this color
#66374E is a dark, moderately saturated red. In OKLCH its lightness is 40%, its chroma 0.074 and its hue 350°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.029 away. White text reads best on it, at 9.45:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.074) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.22:1 |
| White text | 9.45:1 |
Values
| HEX | #66374E |
| RGB | rgb(102, 55, 78) |
| HSL | hsl(331, 30%, 31%) |
| OKLCH | oklch(40.3% 0.074 350.2) |
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 #66374E | 9.45:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #66374E | 2.22:1 | Fails | Lc 12.3 | Not readable |
| #66374E text on white | 9.45:1 | AAA | Lc 91.6 | Preferred for body text |
| #66374E text on black | 2.22:1 | Fails | Lc -10.7 | 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 800.
-
Step 50
50
#F9F4F6
oklch(97.2% 0.006 350.8)
-
Step 100
100
#F1E7EB
oklch(93.7% 0.012 351)
-
Step 200
200
#E6D3DB
oklch(88.5% 0.024 350.2)
-
Step 300
300
#D7B6C4
oklch(80.9% 0.042 350.6)
-
Step 400
400
#C28FA6
oklch(70.6% 0.069 350.3)
-
Step 500
500
#B27391
oklch(63.1% 0.088 349.9)
-
Step 600
600
#9D5B7B
oklch(55.6% 0.095 350.2)
-
Step 700
700
#864A68
oklch(49% 0.09 349.6)
-
Step 800
800 (this color)
#66374E
oklch(40.3% 0.074 350.2)
-
Step 900
900
#593546
oklch(37.9% 0.057 350.4)
-
Step 950
950
#341F29
oklch(27% 0.036 349.8)
#66374E 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) | #3C414F | 0.079 |
| Deuteranopia (no green cones) | #48494D | 0.072 |
| Tritanopia (no blue cones) | #6C363F | 0.027 |
| Achromatopsia (no color) | #464646 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66374E
#66374E
oklch(40.3% 0.074 350.2)
- #0F5543
#0F5543
oklch(40.3% 0.073 170.8)
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 #66374E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.029
- Brownish Purple #76424E ΔE 0.047
- Velvet #750851 ΔE 0.083
- Red Purple #820747 ΔE 0.085
- Grape Purple #5D1451 ΔE 0.085
- Charcoal Grey #3C4142 ΔE 0.085
- Merlot #730039 ΔE 0.086
- Wine #80013F ΔE 0.087
Use #66374E 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.