#666D17
Closest named color: Browny Green (#6F6C0A). oklch(51.2% 0.105 114.3), rgb(102, 109, 23).
Aa
White text reads best on this color (5.57:1).
About this color
#666D17 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 51%, its chroma 0.105 and its hue 114°. 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 5.57:1.
| Hue family | Yellows |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Browny Green (#6F6C0A) |
| Black text | 3.76:1 |
| White text | 5.57:1 |
Values
| HEX | #666D17 |
| RGB | rgb(102, 109, 23) |
| HSL | hsl(65, 65%, 26%) |
| OKLCH | oklch(51.2% 0.105 114.3) |
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 #666D17 | 5.57:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #666D17 | 3.76:1 | AA large text | Lc 26.3 | Dividers and decoration only |
| #666D17 text on white | 5.57:1 | AA | Lc 77.8 | Fine for body text |
| #666D17 text on black | 3.76:1 | AA large text | Lc -24.0 | 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
#BFC59F
oklch(80.9% 0.052 114.9)
-
Step 400
400
#9FA76B
oklch(70.7% 0.082 114.7)
-
Step 500
500
#889041
oklch(63% 0.104 114.2)
-
Step 600
600
#737A1D
oklch(55.6% 0.113 113.8)
-
Step 700
700 (this color)
#666D17
oklch(51.2% 0.105 114.3)
-
Step 800
800
#4E5410
oklch(42.7% 0.088 114.6)
-
Step 900
900
#414516
oklch(37.6% 0.068 113.8)
-
Step 950
950
#26290E
oklch(27.1% 0.044 114.6)
#666D17 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) | #756704 | 0.027 |
| Deuteranopia (no green cones) | #75691E | 0.028 |
| Tritanopia (no blue cones) | #6D665D | 0.093 |
| Achromatopsia (no color) | #686868 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666D17
#666D17
oklch(51.2% 0.105 114.3)
- #6B599D
#6B599D
oklch(51.2% 0.106 294.5)
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 #666D17, 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
- Mud Green #606602 ΔE 0.024
- Muddy Green #657432 ΔE 0.025
- Dark Olive Green #556B2F ΔE 0.031
- Dark Moss Green #606C38 ΔE 0.031
- Greeny Brown #696006 ΔE 0.036
- Olive Green #677A04 ΔE 0.041
Use #666D17 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.