#666B15
Closest named color: Browny Green (#6F6C0A). oklch(50.7% 0.104 113), rgb(102, 107, 21).
Aa
White text reads best on this color (5.70:1).
About this color
#666B15 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 51%, its chroma 0.104 and its hue 113°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Browny Green (#6F6C0A), ΔE 0.015 away. White text reads best on it, at 5.70:1.
| Hue family | Yellows |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.104) |
| Temperature | in between |
| Nearest name | Browny Green (#6F6C0A) |
| Black text | 3.67:1 |
| White text | 5.70:1 |
Values
| HEX | #666B15 |
| RGB | rgb(102, 107, 21) |
| HSL | hsl(63, 67%, 25%) |
| OKLCH | oklch(50.7% 0.104 113) |
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 #666B15 | 5.70:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #666B15 | 3.67:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #666B15 text on white | 5.70:1 | AA | Lc 78.4 | Fine for body text |
| #666B15 text on black | 3.67:1 | AA large text | Lc -23.3 | 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
#EAEBE0
oklch(93.6% 0.015 110.9)
-
Step 200
200
#D9DBC7
oklch(88.4% 0.027 111.6)
-
Step 300
300
#C0C5A0
oklch(81% 0.05 113.8)
-
Step 400
400
#A1A66B
oklch(70.7% 0.08 112.4)
-
Step 500
500
#8A9041
oklch(63.1% 0.103 112.9)
-
Step 600
600
#747A1D
oklch(55.7% 0.112 113.2)
-
Step 700
700 (this color)
#666B15
oklch(50.7% 0.104 113)
-
Step 800
800
#505410
oklch(42.9% 0.087 113)
-
Step 900
900
#424516
oklch(37.7% 0.067 112.6)
-
Step 950
950
#27290E
oklch(27.2% 0.044 112.8)
#666B15 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) | #746601 | 0.024 |
| Deuteranopia (no green cones) | #74671D | 0.027 |
| Tritanopia (no blue cones) | #6D645B | 0.093 |
| Achromatopsia (no color) | #666666 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666B15
#666B15
oklch(50.7% 0.104 113)
- #68599B
#68599B
oklch(50.8% 0.103 292.8)
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 #666B15, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Browny Green #6F6C0A ΔE 0.015
- Brown Green #706C11 ΔE 0.016
- Mud Green #606602 ΔE 0.019
- Dark Olive Green #556B2F ΔE 0.029
- Muddy Green #657432 ΔE 0.030
- Dark Moss Green #606C38 ΔE 0.030
- Greeny Brown #696006 ΔE 0.031
- Camo Green #526525 ΔE 0.038
Use #666B15 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.