#646F4C
Closest named color: Dark Moss Green (#606C38). oklch(52.3% 0.054 122.4), rgb(100, 111, 76).
Aa
White text reads best on this color (5.35:1).
About this color
#646F4C is a medium-dark, muted yellow. In OKLCH its lightness is 52%, its chroma 0.054 and its hue 122°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Moss Green (#606C38), ΔE 0.027 away. White text reads best on it, at 5.35:1.
| Hue family | Yellows |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.054) |
| Temperature | in between |
| Nearest name | Dark Moss Green (#606C38) |
| Black text | 3.92:1 |
| White text | 5.35:1 |
Values
| HEX | #646F4C |
| RGB | rgb(100, 111, 76) |
| HSL | hsl(79, 19%, 37%) |
| OKLCH | oklch(52.3% 0.054 122.4) |
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 #646F4C | 5.35:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #646F4C | 3.92:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #646F4C text on white | 5.35:1 | AA | Lc 76.7 | Fine for body text |
| #646F4C text on black | 3.92:1 | AA large text | Lc -25.1 | 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
#D7DBD0
oklch(88.5% 0.015 123.1)
-
Step 300
300
#BDC4B1
oklch(81% 0.027 123.5)
-
Step 400
400
#9CA589
oklch(70.7% 0.041 121.9)
-
Step 500
500
#838F6B
oklch(63% 0.054 122.9)
-
Step 600
600
#6D7953
oklch(55.6% 0.058 122.5)
-
Step 700
700 (this color)
#646F4C
oklch(52.3% 0.054 122.4)
-
Step 800
800
#4A5338
oklch(42.6% 0.044 123.2)
-
Step 900
900
#3E4530
oklch(37.8% 0.035 123.1)
-
Step 950
950
#24281C
oklch(26.9% 0.022 122.9)
#646F4C 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) | #736B4A | 0.024 |
| Deuteranopia (no green cones) | #726B4E | 0.025 |
| Tritanopia (no blue cones) | #676C66 | 0.044 |
| Achromatopsia (no color) | #6B6B6B | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #646F4C
#646F4C
oklch(52.3% 0.054 122.4)
- #706284
#706284
oklch(52.2% 0.055 303.4)
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 #646F4C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Moss Green #606C38 ΔE 0.027
- Muddy Green #657432 ΔE 0.040
- Grey Brown #7F7053 ΔE 0.045
- Dark Olive Green #556B2F ΔE 0.045
- Dark Taupe #7F684E ΔE 0.047
- Military Green #667C3E ΔE 0.049
- Dirt Brown #836539 ΔE 0.053
- Dim Gray #696969 ΔE 0.054
Use #646F4C 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.