#637F44
Closest named color: Military Green (#667C3E). oklch(56% 0.091 129.7), rgb(99, 127, 68).
Aa
Black text reads best on this color (4.64:1).
About this color
#637F44 is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.091 and its hue 130°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Military Green (#667C3E), ΔE 0.009 away. Black text reads best on it, at 4.64:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.091) |
| Temperature | in between |
| Nearest name | Military Green (#667C3E) |
| Black text | 4.64:1 |
| White text | 4.51:1 |
Values
| HEX | #637F44 |
| RGB | rgb(99, 127, 68) |
| HSL | hsl(88, 30%, 38%) |
| OKLCH | oklch(56% 0.091 129.7) |
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 #637F44 | 4.51:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #637F44 | 4.64:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #637F44 text on white | 4.51:1 | AA | Lc 71.3 | Content text, not long reading |
| #637F44 text on black | 4.64:1 | AA | Lc -30.4 | 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
#F4F6F2
oklch(97.1% 0.006 128.5)
-
Step 100
100
#E7EBE3
oklch(93.5% 0.011 128.6)
-
Step 200
200
#D4DCCD
oklch(88.4% 0.022 130)
-
Step 300
300
#B8C6AB
oklch(80.8% 0.04 129.7)
-
Step 400
400
#93A97E
oklch(70.6% 0.065 130)
-
Step 500
500
#79945D
oklch(63.2% 0.084 129.8)
-
Step 600
600 (this color)
#637F44
oklch(56% 0.091 129.7)
-
Step 700
700
#516A35
oklch(49.1% 0.083 129.7)
-
Step 800
800
#42572C
oklch(42.8% 0.071 130.2)
-
Step 900
900
#384728
oklch(37.6% 0.053 129.7)
-
Step 950
950
#212A18
oklch(27.1% 0.034 130)
#637F44 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) | #84783F | 0.049 |
| Deuteranopia (no green cones) | #807647 | 0.049 |
| Tritanopia (no blue cones) | #657A71 | 0.070 |
| Achromatopsia (no color) | #767676 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637F44
#637F44
oklch(56% 0.091 129.7)
- #85659C
#85659C
oklch(56% 0.09 310.3)
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 #637F44, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Military Green #667C3E ΔE 0.009
- Swamp #698339 ΔE 0.021
- Dark Sage #598556 ΔE 0.024
- Muddy Green #657432 ΔE 0.032
- Khaki Green #728639 ΔE 0.034
- Murky Green #6C7A0E ΔE 0.041
- Moss Green #658B38 ΔE 0.042
- Fern Green #548D44 ΔE 0.044
Use #637F44 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.