#666500
Closest named color: Mud Green (#606602). oklch(49.1% 0.107 109.1), rgb(102, 101, 0).
Aa
White text reads best on this color (6.12:1).
About this color
#666500 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 49%, its chroma 0.107 and its hue 109°. Its hue sits on the warm side of the wheel. The nearest named color is Mud Green (#606602), ΔE 0.010 away. White text reads best on it, at 6.12:1.
| Hue family | Yellows |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.107) |
| Temperature | warm |
| Nearest name | Mud Green (#606602) |
| Black text | 3.42:1 |
| White text | 6.12:1 |
Values
| HEX | #666500 |
| RGB | rgb(102, 101, 0) |
| HSL | hsl(59, 100%, 20%) |
| OKLCH | oklch(49.1% 0.107 109.1) |
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 #666500 | 6.12:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #666500 | 3.42:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #666500 text on white | 6.12:1 | AA | Lc 80.4 | Fine for body text |
| #666500 text on black | 3.42:1 | AA large text | Lc -21.4 | 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
#DADBC6
oklch(88.5% 0.028 109.2)
-
Step 300
300
#C3C49E
oklch(81% 0.051 108.7)
-
Step 400
400
#A4A568
oklch(70.7% 0.082 109.1)
-
Step 500
500
#8E8E3C
oklch(63% 0.105 109.1)
-
Step 600
600
#797812
oklch(55.6% 0.115 109)
-
Step 700
700 (this color)
#666500
oklch(49.1% 0.107 109.1)
-
Step 800
800
#535209
oklch(42.6% 0.088 108.8)
-
Step 900
900
#444413
oklch(37.6% 0.068 109.3)
-
Step 950
950
#28280D
oklch(27% 0.043 109)
#666500 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) | #6E6000 | 0.019 |
| Deuteranopia (no green cones) | #70630D | 0.019 |
| Tritanopia (no blue cones) | #6E5E55 | 0.096 |
| Achromatopsia (no color) | #626262 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #666500
#666500
oklch(49.1% 0.107 109.1)
- #605599
#605599
oklch(49.2% 0.107 289.3)
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 #666500, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mud Green #606602 ΔE 0.010
- Greeny Brown #696006 ΔE 0.016
- Browny Green #6F6C0A ΔE 0.026
- Brown Green #706C11 ΔE 0.028
- Camo Green #526525 ΔE 0.033
- Dark Olive Green #556B2F ΔE 0.034
- Mud #735C12 ΔE 0.036
- Dark Moss Green #606C38 ΔE 0.039
Use #666500 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.