#66641B
Closest named color: Greeny Brown (#696006). oklch(49% 0.093 107.8), rgb(102, 100, 27).
Aa
White text reads best on this color (6.16:1).
About this color
#66641B is a medium-dark, moderately saturated brown. In OKLCH its lightness is 49%, its chroma 0.093 and its hue 108°. Its hue sits on the warm side of the wheel. The nearest named color is Greeny Brown (#696006), ΔE 0.013 away. White text reads best on it, at 6.16:1.
| Hue family | Browns |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.093) |
| Temperature | warm |
| Nearest name | Greeny Brown (#696006) |
| Black text | 3.40:1 |
| White text | 6.16:1 |
Values
| HEX | #66641B |
| RGB | rgb(102, 100, 27) |
| HSL | hsl(58, 58%, 25%) |
| OKLCH | oklch(49% 0.093 107.8) |
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 #66641B | 6.16:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #66641B | 3.40:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #66641B text on white | 6.16:1 | AA | Lc 80.7 | Fine for body text |
| #66641B text on black | 3.40:1 | 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
#F6F6F1
oklch(97.2% 0.007 106.5)
-
Step 100
100
#EAEBE1
oklch(93.7% 0.013 111.3)
-
Step 200
200
#DADBC8
oklch(88.5% 0.026 109.4)
-
Step 300
300
#C3C3A2
oklch(80.9% 0.045 107.4)
-
Step 400
400
#A5A470
oklch(70.7% 0.071 107.1)
-
Step 500
500
#8F8E49
oklch(63.2% 0.092 108)
-
Step 600
600
#797729
oklch(55.5% 0.099 107.8)
-
Step 700
700 (this color)
#66641B
oklch(49% 0.093 107.8)
-
Step 800
800
#535219
oklch(42.7% 0.077 108.3)
-
Step 900
900
#45441B
oklch(37.8% 0.06 107.7)
-
Step 950
950
#282811
oklch(27% 0.038 108.7)
#66641B 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) | #6D600F | 0.015 |
| Deuteranopia (no green cones) | #6E6220 | 0.016 |
| Tritanopia (no blue cones) | #6E5D56 | 0.085 |
| Achromatopsia (no color) | #616161 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66641B
#66641B
oklch(49% 0.093 107.8)
- #5E5792
#5E5792
oklch(49% 0.093 287.9)
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 #66641B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Brown #696006 ΔE 0.013
- Mud Green #606602 ΔE 0.019
- Mud #735C12 ΔE 0.029
- Camo Green #526525 ΔE 0.029
- Dark Olive Green #556B2F ΔE 0.030
- Dark Moss Green #606C38 ΔE 0.030
- Brown Green #706C11 ΔE 0.031
- Browny Green #6F6C0A ΔE 0.031
Use #66641B 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.