#647638
Closest named color: Muddy Green (#657432). oklch(53.6% 0.09 122.8), rgb(100, 118, 56).
Aa
White text reads best on this color (5.01:1).
About this color
#647638 is a medium-dark, moderately saturated yellow. In OKLCH its lightness is 54%, its chroma 0.090 and its hue 123°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Muddy Green (#657432), ΔE 0.007 away. White text reads best on it, at 5.01:1.
| Hue family | Yellows |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.090) |
| Temperature | in between |
| Nearest name | Muddy Green (#657432) |
| Black text | 4.19:1 |
| White text | 5.01:1 |
Values
| HEX | #647638 |
| RGB | rgb(100, 118, 56) |
| HSL | hsl(77, 36%, 34%) |
| OKLCH | oklch(53.6% 0.09 122.8) |
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 #647638 | 5.01:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #647638 | 4.19:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #647638 text on white | 5.01:1 | AA | Lc 74.6 | Content text, not long reading |
| #647638 text on black | 4.19:1 | AA large text | Lc -27.1 | 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 600.
-
Step 50
50
#F5F6F2
oklch(97.1% 0.005 117.9)
-
Step 100
100
#E8EBE3
oklch(93.6% 0.011 123.5)
-
Step 200
200
#D6DCCC
oklch(88.5% 0.022 123.7)
-
Step 300
300
#BBC5A9
oklch(80.8% 0.04 123.3)
-
Step 400
400
#99A87B
oklch(70.8% 0.065 123)
-
Step 500
500
#809259
oklch(63.1% 0.082 123)
-
Step 600
600 (this color)
#647638
oklch(53.6% 0.09 122.8)
-
Step 700
700
#586830
oklch(49% 0.083 122.6)
-
Step 800
800
#485528
oklch(42.7% 0.069 122.6)
-
Step 900
900
#3C4625
oklch(37.6% 0.054 122.8)
-
Step 950
950
#232916
oklch(26.9% 0.034 123)
#647638 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) | #7C7032 | 0.037 |
| Deuteranopia (no green cones) | #7A6F3C | 0.040 |
| Tritanopia (no blue cones) | #687168 | 0.074 |
| Achromatopsia (no color) | #6F6F6F | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #647638
#647638
oklch(53.6% 0.09 122.8)
- #786099
#786099
oklch(53.6% 0.091 302.8)
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 #647638, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muddy Green #657432 ΔE 0.007
- Military Green #667C3E ΔE 0.018
- Dark Moss Green #606C38 ΔE 0.031
- Brown Green #706C11 ΔE 0.036
- Murky Green #6C7A0E ΔE 0.037
- Browny Green #6F6C0A ΔE 0.037
- Olive Green #677A04 ΔE 0.040
- Swamp #698339 ΔE 0.040
Use #647638 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.