#66403D
Closest named color: Purple Brown (#673A3F). oklch(41.5% 0.054 24.6), rgb(102, 64, 61).
Aa
White text reads best on this color (8.87:1).
About this color
#66403D is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.054 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.018 away. White text reads best on it, at 8.87:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.054) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.36:1 |
| White text | 8.87:1 |
Values
| HEX | #66403D |
| RGB | rgb(102, 64, 61) |
| HSL | hsl(4, 25%, 32%) |
| OKLCH | oklch(41.5% 0.054 24.6) |
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 #66403D | 8.87:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #66403D | 2.36:1 | Fails | Lc 13.8 | Not readable |
| #66403D text on white | 8.87:1 | AAA | Lc 90.2 | Preferred for body text |
| #66403D text on black | 2.36:1 | Fails | Lc -12.1 | 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
#F8F4F4
oklch(97% 0.004 17.2)
-
Step 100
100
#F0E8E7
oklch(93.7% 0.009 26)
-
Step 200
200
#E5D5D3
oklch(88.5% 0.018 26.1)
-
Step 300
300
#D4B9B7
oklch(80.8% 0.031 22.9)
-
Step 400
400
#BE9591
oklch(70.7% 0.05 24.8)
-
Step 500
500
#AD7A76
oklch(63% 0.065 24.1)
-
Step 600
600
#98635F
oklch(55.6% 0.07 24.3)
-
Step 700
700
#82524E
oklch(49.1% 0.065 24.9)
-
Step 800
800 (this color)
#66403D
oklch(41.5% 0.054 24.6)
-
Step 900
900
#563936
oklch(37.7% 0.042 25.8)
-
Step 950
950
#322120
oklch(26.8% 0.027 22.8)
#66403D 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) | #48453D | 0.055 |
| Deuteranopia (no green cones) | #514D3C | 0.052 |
| Tritanopia (no blue cones) | #6E3B3F | 0.021 |
| Achromatopsia (no color) | #4A4A4A | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66403D
#66403D
oklch(41.5% 0.054 24.6)
- #225459
#225459
oklch(41.4% 0.054 204.2)
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 #66403D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.018
- Brownish Purple #76424E ΔE 0.042
- Mud Brown #60460F ΔE 0.066
- Chestnut #742802 ΔE 0.072
- Charcoal Grey #3C4142 ΔE 0.075
- Milk Chocolate #7F4E1E ΔE 0.080
- Red Brown #8B2E16 ΔE 0.082
- Rust Brown #8B3103 ΔE 0.086
Use #66403D 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.