#66640D
Closest named color: Greeny Brown (#696006). oklch(49% 0.101 108.2), rgb(102, 100, 13).
Aa
White text reads best on this color (6.18:1).
About this color
#66640D is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 49%, its chroma 0.101 and its hue 108°. Its hue sits on the warm side of the wheel. The nearest named color is Greeny Brown (#696006), ΔE 0.012 away. White text reads best on it, at 6.18:1.
| Hue family | Yellows |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.101) |
| Temperature | warm |
| Nearest name | Greeny Brown (#696006) |
| Black text | 3.39:1 |
| White text | 6.18:1 |
Values
| HEX | #66640D |
| RGB | rgb(102, 100, 13) |
| HSL | hsl(59, 77%, 23%) |
| OKLCH | oklch(49% 0.101 108.2) |
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 #66640D | 6.18:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #66640D | 3.39:1 | AA large text | Lc 23.3 | Dividers and decoration only |
| #66640D text on white | 6.18:1 | AA | Lc 80.7 | Fine for body text |
| #66640D text on black | 3.39:1 | AA large text | Lc -21.1 | 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
#EAEBE0
oklch(93.6% 0.015 110.9)
-
Step 200
200
#DADBC7
oklch(88.5% 0.027 109.3)
-
Step 300
300
#C3C4A0
oklch(81% 0.049 108.8)
-
Step 400
400
#A5A56B
oklch(70.8% 0.078 108.2)
-
Step 500
500
#8F8E41
oklch(63.1% 0.1 108.3)
-
Step 600
600
#7A781D
oklch(55.7% 0.109 108.2)
-
Step 700
700 (this color)
#66640D
oklch(49% 0.101 108.2)
-
Step 800
800
#535211
oklch(42.7% 0.083 108.6)
-
Step 900
900
#454417
oklch(37.7% 0.064 107.9)
-
Step 950
950
#28280F
oklch(27% 0.041 108.8)
#66640D 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) | #6D6000 | 0.015 |
| Deuteranopia (no green cones) | #6F6216 | 0.018 |
| Tritanopia (no blue cones) | #6E5D55 | 0.091 |
| Achromatopsia (no color) | #616161 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66640D
#66640D
oklch(49% 0.101 108.2)
- #5E5696
#5E5696
oklch(49% 0.101 287.8)
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 #66640D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Brown #696006 ΔE 0.012
- Mud Green #606602 ΔE 0.013
- Browny Green #6F6C0A ΔE 0.029
- Brown Green #706C11 ΔE 0.030
- Camo Green #526525 ΔE 0.031
- Mud #735C12 ΔE 0.032
- Dark Olive Green #556B2F ΔE 0.032
- Dark Moss Green #606C38 ΔE 0.036
Use #66640D 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.