#66404D
Closest named color: Purple Brown (#673A3F). oklch(42% 0.056 357.7), rgb(102, 64, 77).
Aa
White text reads best on this color (8.73:1).
About this color
#66404D is a dark, muted red. In OKLCH its lightness is 42%, its chroma 0.056 and its hue 358°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.023 away. White text reads best on it, at 8.73:1.
| Hue family | Reds |
| Lightness | dark (42%) |
| Chroma | muted (0.056) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.40:1 |
| White text | 8.73:1 |
Values
| HEX | #66404D |
| RGB | rgb(102, 64, 77) |
| HSL | hsl(339, 23%, 33%) |
| OKLCH | oklch(42% 0.056 357.7) |
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 #66404D | 8.73:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #66404D | 2.40:1 | Fails | Lc 14.2 | Not readable |
| #66404D text on white | 8.73:1 | AAA | Lc 89.8 | Fine for body text |
| #66404D text on black | 2.40:1 | Fails | Lc -12.5 | 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
#F8F4F5
oklch(97.1% 0.004 360)
-
Step 100
100
#F0E7EA
oklch(93.6% 0.011 354.9)
-
Step 200
200
#E4D4D9
oklch(88.4% 0.019 356.5)
-
Step 300
300
#D3B8C0
oklch(80.8% 0.033 358)
-
Step 400
400
#BD93A0
oklch(70.6% 0.053 358.1)
-
Step 500
500
#AB7989
oklch(63.1% 0.066 358.3)
-
Step 600
600
#966173
oklch(55.5% 0.073 357.8)
-
Step 700
700
#805061
oklch(49.1% 0.068 357.1)
-
Step 800
800 (this color)
#66404D
oklch(42% 0.056 357.7)
-
Step 900
900
#553842
oklch(37.8% 0.044 357.1)
-
Step 950
950
#322126
oklch(27.1% 0.027 359.8)
#66404D 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) | #45474D | 0.060 |
| Deuteranopia (no green cones) | #4E4E4C | 0.057 |
| Tritanopia (no blue cones) | #6C3E44 | 0.017 |
| Achromatopsia (no color) | #4B4B4B | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66404D
#66404D
oklch(42% 0.056 357.7)
- #26574D
#26574D
oklch(42% 0.056 178.2)
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 #66404D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.023
- Brownish Purple #76424E ΔE 0.032
- Dark Mauve #874C62 ΔE 0.078
- Charcoal Grey #3C4142 ΔE 0.079
- Dusty Grape #545775 ΔE 0.081
- Mud Brown #60460F ΔE 0.090
- Chestnut #742802 ΔE 0.091
- Dusk #4E5481 ΔE 0.094
Use #66404D 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.