#638643
Closest named color: Swamp (#698339). oklch(57.7% 0.103 131.6), rgb(99, 134, 67).
Aa
Black text reads best on this color (5.02:1).
About this color
#638643 is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.103 and its hue 132°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Swamp (#698339), ΔE 0.012 away. Black text reads best on it, at 5.02:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.103) |
| Temperature | in between |
| Nearest name | Swamp (#698339) |
| Black text | 5.02:1 |
| White text | 4.18:1 |
Values
| HEX | #638643 |
| RGB | rgb(99, 134, 67) |
| HSL | hsl(91, 33%, 39%) |
| OKLCH | oklch(57.7% 0.103 131.6) |
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 #638643 | 4.18:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #638643 | 5.02:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #638643 text on white | 4.18:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #638643 text on black | 5.02:1 | AA | Lc -32.9 | 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
#E7ECE3
oklch(93.7% 0.013 130.8)
-
Step 200
200
#D3DDCC
oklch(88.5% 0.025 132.1)
-
Step 300
300
#B6C7A9
oklch(80.9% 0.045 131.6)
-
Step 400
400
#90AB7A
oklch(70.8% 0.075 131.5)
-
Step 500
500
#749558
oklch(63% 0.094 131.8)
-
Step 600
600 (this color)
#638643
oklch(57.7% 0.103 131.6)
-
Step 700
700
#4C6C2F
oklch(49.2% 0.096 132)
-
Step 800
800
#3F5828
oklch(42.8% 0.079 131.7)
-
Step 900
900
#354825
oklch(37.6% 0.061 132)
-
Step 950
950
#1F2A16
oklch(26.8% 0.038 132)
#638643 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) | #8B7E3D | 0.058 |
| Deuteranopia (no green cones) | #867B47 | 0.059 |
| Tritanopia (no blue cones) | #648176 | 0.077 |
| Achromatopsia (no color) | #7C7C7C | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638643
#638643
oklch(57.7% 0.103 131.6)
- #8E67A6
#8E67A6
oklch(57.8% 0.103 311.8)
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 #638643, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Swamp #698339 ΔE 0.012
- Khaki Green #728639 ΔE 0.020
- Moss Green #658B38 ΔE 0.022
- Fern Green #548D44 ΔE 0.025
- Dark Sage #598556 ΔE 0.026
- Military Green #667C3E ΔE 0.028
- Mossy Green #638B27 ΔE 0.034
- Light Forest Green #4F9153 ΔE 0.034
Use #638643 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.