#637E43
Closest named color: Military Green (#667C3E). oklch(55.7% 0.09 129.1), rgb(99, 126, 67).
Aa
Black text reads best on this color (4.59:1).
About this color
#637E43 is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.090 and its hue 129°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Military Green (#667C3E), ΔE 0.007 away. Black text reads best on it, at 4.59:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.090) |
| Temperature | in between |
| Nearest name | Military Green (#667C3E) |
| Black text | 4.59:1 |
| White text | 4.56:1 |
Values
| HEX | #637E43 |
| RGB | rgb(99, 126, 67) |
| HSL | hsl(87, 31%, 38%) |
| OKLCH | oklch(55.7% 0.09 129.1) |
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 #637E43 | 4.56:1 | AA | Lc -77.1 | Fine for body text |
| Black text on #637E43 | 4.59:1 | AA | Lc 32.4 | Non-text elements, placeholder text |
| #637E43 text on white | 4.56:1 | AA | Lc 71.7 | Content text, not long reading |
| #637E43 text on black | 4.59:1 | AA | Lc -30.0 | 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
#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
#94A97E
oklch(70.7% 0.065 129.1)
-
Step 500
500
#7A945D
oklch(63.2% 0.083 129.1)
-
Step 600
600 (this color)
#637E43
oklch(55.7% 0.09 129.1)
-
Step 700
700
#526A34
oklch(49.1% 0.084 128.8)
-
Step 800
800
#43562C
oklch(42.6% 0.069 128.9)
-
Step 900
900
#394728
oklch(37.7% 0.053 128.5)
-
Step 950
950
#212A18
oklch(27.1% 0.034 130)
#637E43 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) | #83773E | 0.048 |
| Deuteranopia (no green cones) | #7F7546 | 0.048 |
| Tritanopia (no blue cones) | #657970 | 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°).
- #637E43
#637E43
oklch(55.7% 0.09 129.1)
- #83659C
#83659C
oklch(55.8% 0.09 308.7)
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 #637E43, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Military Green #667C3E ΔE 0.007
- Swamp #698339 ΔE 0.023
- Dark Sage #598556 ΔE 0.026
- Muddy Green #657432 ΔE 0.030
- Khaki Green #728639 ΔE 0.036
- Murky Green #6C7A0E ΔE 0.040
- Olive Green #677A04 ΔE 0.043
- Moss Green #658B38 ΔE 0.044
Use #637E43 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.