#637D65
Closest named color: Dark Sage (#598556). oklch(56.2% 0.047 147), rgb(99, 125, 101).
Aa
Black text reads best on this color (4.65:1).
About this color
#637D65 is a medium-dark, muted green. In OKLCH its lightness is 56%, its chroma 0.047 and its hue 147°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Sage (#598556), ΔE 0.040 away. Black text reads best on it, at 4.65:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.047) |
| Temperature | in between |
| Nearest name | Dark Sage (#598556) |
| Black text | 4.65:1 |
| White text | 4.51:1 |
Values
| HEX | #637D65 |
| RGB | rgb(99, 125, 101) |
| HSL | hsl(125, 12%, 44%) |
| OKLCH | oklch(56.2% 0.047 147) |
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 #637D65 | 4.51:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #637D65 | 4.65:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #637D65 text on white | 4.51:1 | AA | Lc 71.3 | Content text, not long reading |
| #637D65 text on black | 4.65:1 | 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
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E7EBE7
oklch(93.6% 0.007 145.5)
-
Step 200
200
#D4DBD5
oklch(88.4% 0.011 149.8)
-
Step 300
300
#B8C5B9
oklch(81% 0.022 147.6)
-
Step 400
400
#93A794
oklch(70.7% 0.035 146.6)
-
Step 500
500
#79917A
oklch(63.1% 0.044 146.1)
-
Step 600
600 (this color)
#637D65
oklch(56.2% 0.047 147)
-
Step 700
700
#506852
oklch(49.1% 0.045 147)
-
Step 800
800
#425543
oklch(42.8% 0.038 146.2)
-
Step 900
900
#384639
oklch(37.8% 0.028 146.9)
-
Step 950
950
#212921
oklch(27% 0.018 145)
#637D65 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) | #7E7864 | 0.040 |
| Deuteranopia (no green cones) | #797566 | 0.038 |
| Tritanopia (no blue cones) | #607C76 | 0.027 |
| Achromatopsia (no color) | #767676 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #637D65
#637D65
oklch(56.2% 0.047 147)
- #846C84
#846C84
oklch(56.3% 0.046 326.2)
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 #637D65, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sage #598556 ΔE 0.040
- Slate Green #658D6D ΔE 0.046
- Grey Brown #7F7053 ΔE 0.050
- Military Green #667C3E ΔE 0.051
- Battleship Gray #6C757D ΔE 0.053
- Battleship Grey #6B7C85 ΔE 0.053
- Medium Grey #7D7F7C ΔE 0.053
- Steel Grey #6F828A ΔE 0.059
Use #637D65 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.