#66633E
Closest named color: Dark Moss Green (#606C38). oklch(49.3% 0.054 104.2), rgb(102, 99, 62).
Aa
White text reads best on this color (6.14:1).
About this color
#66633E is a medium-dark, muted brown. In OKLCH its lightness is 49%, its chroma 0.054 and its hue 104°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.032 away. White text reads best on it, at 6.14:1.
| Hue family | Browns |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.054) |
| Temperature | warm |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.41:1 |
| White text | 6.14:1 |
Values
| HEX | #66633E |
| RGB | rgb(102, 99, 62) |
| HSL | hsl(55, 24%, 32%) |
| OKLCH | oklch(49.3% 0.054 104.2) |
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 #66633E | 6.14:1 | AA | Lc -85.8 | Fine for body text |
| Black text on #66633E | 3.41:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #66633E text on white | 6.14:1 | AA | Lc 80.6 | Fine for body text |
| #66633E text on black | 3.41:1 | AA large text | Lc -21.2 | Dividers and decoration only |
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 700.
-
Step 50
50
#F6F5F3
oklch(97% 0.003 84.6)
-
Step 100
100
#EAEAE4
oklch(93.5% 0.008 106.6)
-
Step 200
200
#DADACF
oklch(88.5% 0.015 106.7)
-
Step 300
300
#C3C2AF
oklch(81% 0.026 104.5)
-
Step 400
400
#A4A284
oklch(70.6% 0.042 104.3)
-
Step 500
500
#8E8C65
oklch(63.2% 0.055 105.4)
-
Step 600
600
#79754D
oklch(55.6% 0.058 103.2)
-
Step 700
700 (this color)
#66633E
oklch(49.3% 0.054 104.2)
-
Step 800
800
#535033
oklch(42.6% 0.045 103.1)
-
Step 900
900
#44432D
oklch(37.7% 0.035 105.8)
-
Step 950
950
#28271A
oklch(27% 0.023 104.1)
#66633E 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) | #69603B | 0.009 |
| Deuteranopia (no green cones) | #6A623F | 0.007 |
| Tritanopia (no blue cones) | #6C5E5A | 0.050 |
| Achromatopsia (no color) | #626262 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66633E
#66633E
oklch(49.3% 0.054 104.2)
- #5D5D7F
#5D5D7F
oklch(49.2% 0.054 284.2)
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 #66633E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.032
- Mud #735C12 ΔE 0.042
- Dark Olive Green #556B2F ΔE 0.044
- Greeny Brown #696006 ΔE 0.046
- Camo Green #526525 ΔE 0.048
- Dirt Brown #836539 ΔE 0.049
- Dark Taupe #7F684E ΔE 0.051
- Mud Green #606602 ΔE 0.056
Use #66633E 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.