#66831D
Closest named color: Swamp Green (#748500). oklch(56.8% 0.129 124.6), rgb(102, 131, 29).
Aa
Black text reads best on this color (4.82:1).
About this color
#66831D is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 57%, its chroma 0.129 and its hue 125°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Swamp Green (#748500), ΔE 0.022 away. Black text reads best on it, at 4.82:1.
| Hue family | Yellows |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.129) |
| Temperature | in between |
| Nearest name | Swamp Green (#748500) |
| Black text | 4.82:1 |
| White text | 4.34:1 |
Values
| HEX | #66831D |
| RGB | rgb(102, 131, 29) |
| HSL | hsl(77, 64%, 31%) |
| OKLCH | oklch(56.8% 0.129 124.6) |
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 #66831D | 4.34:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #66831D | 4.82:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #66831D text on white | 4.34:1 | AA large text | Lc 70.0 | Content text, not long reading |
| #66831D text on black | 4.82:1 | AA | Lc -31.7 | Non-text elements, placeholder text |
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
#F4F6F1
oklch(97% 0.007 124.4)
-
Step 100
100
#E7ECE0
oklch(93.6% 0.017 125.3)
-
Step 200
200
#D4DDC6
oklch(88.4% 0.032 124.5)
-
Step 300
300
#B8C89F
oklch(81% 0.058 125)
-
Step 400
400
#94AB69
oklch(70.8% 0.094 124.4)
-
Step 500
500
#7A963E
oklch(63.2% 0.12 124.5)
-
Step 600
600 (this color)
#66831D
oklch(56.8% 0.129 124.6)
-
Step 700
700
#526B06
oklch(49% 0.119 124.3)
-
Step 800
800
#43580D
oklch(42.8% 0.1 124.8)
-
Step 900
900
#384815
oklch(37.6% 0.077 124.9)
-
Step 950
950
#212A0E
oklch(26.9% 0.048 124.4)
#66831D 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) | #8B7A05 | 0.056 |
| Deuteranopia (no green cones) | #877927 | 0.057 |
| Tritanopia (no blue cones) | #6B7C70 | 0.107 |
| Achromatopsia (no color) | #797979 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66831D
#66831D
oklch(56.8% 0.129 124.6)
- #8861B3
#8861B3
oklch(56.8% 0.128 304.6)
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 #66831D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Swamp Green #748500 ΔE 0.022
- Mossy Green #638B27 ΔE 0.022
- Swamp #698339 ΔE 0.024
- Murky Green #6C7A0E ΔE 0.025
- Olive Green #677A04 ΔE 0.025
- Moss Green #658B38 ΔE 0.027
- Sap Green #5C8B15 ΔE 0.027
- Khaki Green #728639 ΔE 0.031
Use #66831D 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.