#637D4E
Closest named color: Military Green (#667C3E). oklch(55.7% 0.075 132), rgb(99, 125, 78).
Aa
White text reads best on this color (4.59:1).
About this color
#637D4E is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.075 and its hue 132°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Military Green (#667C3E), ΔE 0.019 away. White text reads best on it, at 4.59:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.075) |
| Temperature | in between |
| Nearest name | Military Green (#667C3E) |
| Black text | 4.57:1 |
| White text | 4.59:1 |
Values
| HEX | #637D4E |
| RGB | rgb(99, 125, 78) |
| HSL | hsl(93, 23%, 40%) |
| OKLCH | oklch(55.7% 0.075 132) |
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 #637D4E | 4.59:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #637D4E | 4.57:1 | AA | Lc 32.2 | Non-text elements, placeholder text |
| #637D4E text on white | 4.59:1 | AA | Lc 71.9 | Content text, not long reading |
| #637D4E text on black | 4.57:1 | AA | Lc -29.8 | 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
#F4F6F3
oklch(97.1% 0.004 134.8)
-
Step 100
100
#E7EBE5
oklch(93.5% 0.009 134.9)
-
Step 200
200
#D4DCCF
oklch(88.5% 0.02 133.1)
-
Step 300
300
#B9C6AF
oklch(81% 0.035 131.4)
-
Step 400
400
#94A885
oklch(70.6% 0.054 132)
-
Step 500
500
#7A9367
oklch(63.2% 0.07 132.2)
-
Step 600
600 (this color)
#637D4E
oklch(55.7% 0.075 132)
-
Step 700
700
#52693F
oklch(49.1% 0.069 131.9)
-
Step 800
800
#435634
oklch(42.8% 0.058 132.2)
-
Step 900
900
#39472D
oklch(37.8% 0.046 131.3)
-
Step 950
950
#21291B
oklch(26.8% 0.028 132.2)
#637D4E 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) | #81774B | 0.045 |
| Deuteranopia (no green cones) | #7D7550 | 0.044 |
| Tritanopia (no blue cones) | #647971 | 0.056 |
| Achromatopsia (no color) | #757575 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637D4E
#637D4E
oklch(55.7% 0.075 132)
- #826794
#826794
oklch(55.7% 0.075 311.3)
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 #637D4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Military Green #667C3E ΔE 0.019
- Dark Sage #598556 ΔE 0.024
- Muddy Green #657432 ΔE 0.035
- Swamp #698339 ΔE 0.035
- Khaki Green #728639 ΔE 0.046
- Drab #828344 ΔE 0.050
- Dark Moss Green #606C38 ΔE 0.051
- Murky Green #6C7A0E ΔE 0.054
Use #637D4E 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.