#66731B
Closest named color: Muddy Green (#657432). oklch(52.7% 0.11 117.8), rgb(102, 115, 27).
Aa
White text reads best on this color (5.20:1).
About this color
#66731B is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 53%, its chroma 0.110 and its hue 118°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Muddy Green (#657432), ΔE 0.019 away. White text reads best on it, at 5.20:1.
| Hue family | Yellows |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.110) |
| Temperature | in between |
| Nearest name | Muddy Green (#657432) |
| Black text | 4.03:1 |
| White text | 5.20:1 |
Values
| HEX | #66731B |
| RGB | rgb(102, 115, 27) |
| HSL | hsl(69, 62%, 28%) |
| OKLCH | oklch(52.7% 0.11 117.8) |
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 #66731B | 5.20:1 | AA | Lc -81.1 | Fine for body text |
| Black text on #66731B | 4.03:1 | AA large text | Lc 28.4 | Dividers and decoration only |
| #66731B text on white | 5.20:1 | AA | Lc 75.7 | Fine for body text |
| #66731B text on black | 4.03:1 | AA large text | Lc -26.0 | 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 600.
-
Step 50
50
#F5F6F1
oklch(97.1% 0.007 115.7)
-
Step 100
100
#E9EBE1
oklch(93.6% 0.013 115.8)
-
Step 200
200
#D7DCC8
oklch(88.5% 0.027 118.4)
-
Step 300
300
#BDC5A2
oklch(80.8% 0.048 118)
-
Step 400
400
#9CA86E
oklch(70.8% 0.08 118)
-
Step 500
500
#849246
oklch(63.2% 0.102 118.1)
-
Step 600
600 (this color)
#66731B
oklch(52.7% 0.11 117.8)
-
Step 700
700
#5C6818
oklch(49.1% 0.102 117.9)
-
Step 800
800
#4B5517
oklch(42.7% 0.085 118.1)
-
Step 900
900
#3F461A
oklch(37.7% 0.066 117.2)
-
Step 950
950
#252910
oklch(27% 0.042 116.8)
#66731B 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) | #7B6C09 | 0.035 |
| Deuteranopia (no green cones) | #7A6D23 | 0.037 |
| Tritanopia (no blue cones) | #6D6C62 | 0.096 |
| Achromatopsia (no color) | #6D6D6D | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66731B
#66731B
oklch(52.7% 0.11 117.8)
- #735CA2
#735CA2
oklch(52.8% 0.109 297.7)
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 #66731B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muddy Green #657432 ΔE 0.019
- Browny Green #6F6C0A ΔE 0.022
- Brown Green #706C11 ΔE 0.023
- Murky Green #6C7A0E ΔE 0.025
- Olive Green #677A04 ΔE 0.025
- Military Green #667C3E ΔE 0.035
- Dark Moss Green #606C38 ΔE 0.039
- Mud Green #606602 ΔE 0.040
Use #66731B 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.