#637E52
Closest named color: Dark Sage (#598556). oklch(56% 0.072 133.9), rgb(99, 126, 82).
Aa
Black text reads best on this color (4.63:1).
About this color
#637E52 is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.072 and its hue 134°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Sage (#598556), ΔE 0.022 away. Black text reads best on it, at 4.63:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.072) |
| Temperature | in between |
| Nearest name | Dark Sage (#598556) |
| Black text | 4.63:1 |
| White text | 4.52:1 |
Values
| HEX | #637E52 |
| RGB | rgb(99, 126, 82) |
| HSL | hsl(97, 21%, 41%) |
| OKLCH | oklch(56% 0.072 133.9) |
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 #637E52 | 4.52:1 | AA | Lc -76.9 | Fine for body text |
| Black text on #637E52 | 4.63:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #637E52 text on white | 4.52:1 | AA | Lc 71.4 | Content text, not long reading |
| #637E52 text on black | 4.63:1 | AA | Lc -30.3 | 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
#F4F6F3
oklch(97.1% 0.004 134.8)
-
Step 100
100
#E7EBE5
oklch(93.5% 0.009 134.9)
-
Step 200
200
#D4DCD0
oklch(88.5% 0.018 134.9)
-
Step 300
300
#B8C6B0
oklch(81% 0.034 134)
-
Step 400
400
#94A887
oklch(70.7% 0.052 133.1)
-
Step 500
500
#799369
oklch(63.2% 0.068 133.9)
-
Step 600
600 (this color)
#637E52
oklch(56% 0.072 133.9)
-
Step 700
700
#516941
oklch(49% 0.067 133.5)
-
Step 800
800
#425636
oklch(42.7% 0.056 134.3)
-
Step 900
900
#38472F
oklch(37.8% 0.044 134.1)
-
Step 950
950
#21291C
oklch(26.9% 0.026 133.7)
#637E52 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) | #81784F | 0.044 |
| Deuteranopia (no green cones) | #7D7554 | 0.045 |
| Tritanopia (no blue cones) | #637B73 | 0.052 |
| Achromatopsia (no color) | #767676 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637E52
#637E52
oklch(56% 0.072 133.9)
- #846892
#846892
oklch(56% 0.071 314.2)
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 #637E52, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sage #598556 ΔE 0.022
- Military Green #667C3E ΔE 0.023
- Swamp #698339 ΔE 0.038
- Muddy Green #657432 ΔE 0.040
- Khaki Green #728639 ΔE 0.047
- Slate Green #658D6D ΔE 0.049
- Drab #828344 ΔE 0.050
- Dark Moss Green #606C38 ΔE 0.055
Use #637E52 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.