#646D47
Closest named color: Dark Moss Green (#606C38). oklch(51.7% 0.057 119.3), rgb(100, 109, 71).
Aa
White text reads best on this color (5.49:1).
About this color
#646D47 is a medium-dark, muted yellow. In OKLCH its lightness is 52%, its chroma 0.057 and its hue 119°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.021 away. White text reads best on it, at 5.49:1.
| Hue family | Yellows |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.057) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.82:1 |
| White text | 5.49:1 |
Values
| HEX | #646D47 |
| RGB | rgb(100, 109, 71) |
| HSL | hsl(74, 21%, 35%) |
| OKLCH | oklch(51.7% 0.057 119.3) |
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 #646D47 | 5.49:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #646D47 | 3.82:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #646D47 text on white | 5.49:1 | AA | Lc 77.4 | Fine for body text |
| #646D47 text on black | 3.82:1 | AA large text | Lc -24.3 | 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
#F5F6F3
oklch(97.2% 0.004 121.6)
-
Step 100
100
#E9EBE5
oklch(93.7% 0.008 121.6)
-
Step 200
200
#D8DBD0
oklch(88.6% 0.015 119.1)
-
Step 300
300
#BEC3B0
oklch(80.8% 0.027 119)
-
Step 400
400
#9DA586
oklch(70.7% 0.045 119.3)
-
Step 500
500
#858F68
oklch(63.1% 0.057 119.7)
-
Step 600
600
#6F794F
oklch(55.7% 0.062 119.4)
-
Step 700
700 (this color)
#646D47
oklch(51.7% 0.057 119.3)
-
Step 800
800
#4C5335
oklch(42.8% 0.047 119.1)
-
Step 900
900
#3F452E
oklch(37.8% 0.038 120.1)
-
Step 950
950
#25281B
oklch(26.9% 0.023 118.6)
#646D47 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) | #726944 | 0.023 |
| Deuteranopia (no green cones) | #716949 | 0.024 |
| Tritanopia (no blue cones) | #676963 | 0.048 |
| Achromatopsia (no color) | #696969 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646D47
#646D47
oklch(51.7% 0.057 119.3)
- #6C6185
#6C6185
oklch(51.7% 0.057 298.4)
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 #646D47, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.021
- Muddy Green #657432 ΔE 0.038
- Dark Olive Green #556B2F ΔE 0.040
- Dark Taupe #7F684E ΔE 0.048
- Grey Brown #7F7053 ΔE 0.048
- Brown Green #706C11 ΔE 0.051
- Military Green #667C3E ΔE 0.051
- Dirt Brown #836539 ΔE 0.051
Use #646D47 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.