#666A18
Closest named color: Browny Green (#6F6C0A). oklch(50.5% 0.101 112.3), rgb(102, 106, 24).
Aa
White text reads best on this color (5.76:1).
About this color
#666A18 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 50%, its chroma 0.101 and its hue 112°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Browny Green (#6F6C0A), ΔE 0.017 away. White text reads best on it, at 5.76:1.
| Hue family | Yellows |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.101) |
| Temperature | in between |
| Nearest name | Browny Green (#6F6C0A) |
| Black text | 3.63:1 |
| White text | 5.76:1 |
Values
| HEX | #666A18 |
| RGB | rgb(102, 106, 24) |
| HSL | hsl(63, 63%, 25%) |
| OKLCH | oklch(50.5% 0.101 112.3) |
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 #666A18 | 5.76:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #666A18 | 3.63:1 | AA large text | Lc 25.3 | Dividers and decoration only |
| #666A18 text on white | 5.76:1 | AA | Lc 78.8 | Fine for body text |
| #666A18 text on black | 3.63:1 | AA large text | Lc -23.0 | 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
#EAEBE0
oklch(93.6% 0.015 110.9)
-
Step 200
200
#D9DBC7
oklch(88.4% 0.027 111.6)
-
Step 300
300
#C1C4A0
oklch(80.9% 0.049 111.4)
-
Step 400
400
#A1A66C
oklch(70.7% 0.079 112.4)
-
Step 500
500
#8B9043
oklch(63.2% 0.101 112.3)
-
Step 600
600
#757921
oklch(55.6% 0.108 112)
-
Step 700
700 (this color)
#666A18
oklch(50.5% 0.101 112.3)
-
Step 800
800
#505313
oklch(42.6% 0.084 112.1)
-
Step 900
900
#424518
oklch(37.7% 0.065 112.7)
-
Step 950
950
#27280F
oklch(26.9% 0.041 110.9)
#666A18 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) | #736507 | 0.023 |
| Deuteranopia (no green cones) | #73671F | 0.024 |
| Tritanopia (no blue cones) | #6D635A | 0.090 |
| Achromatopsia (no color) | #666666 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666A18
#666A18
oklch(50.5% 0.101 112.3)
- #675999
#675999
oklch(50.6% 0.1 292.5)
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 #666A18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Browny Green #6F6C0A ΔE 0.017
- Brown Green #706C11 ΔE 0.017
- Mud Green #606602 ΔE 0.018
- Dark Olive Green #556B2F ΔE 0.027
- Greeny Brown #696006 ΔE 0.028
- Dark Moss Green #606C38 ΔE 0.028
- Muddy Green #657432 ΔE 0.031
- Camo Green #526525 ΔE 0.036
Use #666A18 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.