#666E1B
Closest named color: Browny Green (#6F6C0A). oklch(51.5% 0.104 114.9), rgb(102, 110, 27).
Aa
White text reads best on this color (5.51:1).
About this color
#666E1B is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 51%, its chroma 0.104 and its hue 115°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Browny Green (#6F6C0A), ΔE 0.014 away. White text reads best on it, at 5.51:1.
| Hue family | Yellows |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.104) |
| Temperature | in between |
| Nearest name | Browny Green (#6F6C0A) |
| Black text | 3.81:1 |
| White text | 5.51:1 |
Values
| HEX | #666E1B |
| RGB | rgb(102, 110, 27) |
| HSL | hsl(66, 61%, 27%) |
| OKLCH | oklch(51.5% 0.104 114.9) |
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 #666E1B | 5.51:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #666E1B | 3.81:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #666E1B text on white | 5.51:1 | AA | Lc 77.4 | Fine for body text |
| #666E1B text on black | 3.81:1 | AA large text | Lc -24.3 | 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
#F5F6F1
oklch(97.1% 0.007 115.7)
-
Step 100
100
#E9EBE0
oklch(93.6% 0.015 115)
-
Step 200
200
#D8DCC7
oklch(88.6% 0.029 115.7)
-
Step 300
300
#BFC5A0
oklch(80.9% 0.051 115)
-
Step 400
400
#9FA76C
oklch(70.8% 0.081 114.8)
-
Step 500
500
#889143
oklch(63.2% 0.103 114.9)
-
Step 600
600
#727A20
oklch(55.5% 0.111 114.5)
-
Step 700
700 (this color)
#666E1B
oklch(51.5% 0.104 114.9)
-
Step 800
800
#4E5413
oklch(42.7% 0.086 114.7)
-
Step 900
900
#414618
oklch(37.9% 0.067 114.9)
-
Step 950
950
#26290F
oklch(27.1% 0.043 114.7)
#666E1B 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) | #76680C | 0.028 |
| Deuteranopia (no green cones) | #766922 | 0.031 |
| Tritanopia (no blue cones) | #6D675E | 0.092 |
| Achromatopsia (no color) | #696969 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666E1B
#666E1B
oklch(51.5% 0.104 114.9)
- #6C5A9D
#6C5A9D
oklch(51.5% 0.105 294.8)
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 #666E1B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Browny Green #6F6C0A ΔE 0.014
- Brown Green #706C11 ΔE 0.015
- Muddy Green #657432 ΔE 0.022
- Mud Green #606602 ΔE 0.027
- Dark Moss Green #606C38 ΔE 0.030
- Dark Olive Green #556B2F ΔE 0.031
- Greeny Brown #696006 ΔE 0.039
- Murky Green #6C7A0E ΔE 0.039
Use #666E1B 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.