#638B2D
Closest named color: Mossy Green (#638B27). oklch(58.7% 0.131 129.5), rgb(99, 139, 45).
Aa
Black text reads best on this color (5.26:1).
About this color
#638B2D is a medium-dark, moderately saturated green. In OKLCH its lightness is 59%, its chroma 0.131 and its hue 129°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Mossy Green (#638B27), ΔE 0.005 away. Black text reads best on it, at 5.26:1.
| Hue family | Greens |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.131) |
| Temperature | in between |
| Nearest name | Mossy Green (#638B27) |
| Black text | 5.26:1 |
| White text | 3.99:1 |
Values
| HEX | #638B2D |
| RGB | rgb(99, 139, 45) |
| HSL | hsl(86, 51%, 36%) |
| OKLCH | oklch(58.7% 0.131 129.5) |
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 #638B2D | 3.99:1 | AA large text | Lc -72.6 | Content text, not long reading |
| Black text on #638B2D | 5.26:1 | AA | Lc 37.0 | Non-text elements, placeholder text |
| #638B2D text on white | 3.99:1 | AA large text | Lc 67.1 | Content text, not long reading |
| #638B2D text on black | 5.26:1 | AA | Lc -34.6 | 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
#F4F7F1
oklch(97.2% 0.009 128.6)
-
Step 100
100
#E6ECE0
oklch(93.5% 0.017 128.7)
-
Step 200
200
#D2DEC7
oklch(88.5% 0.034 129.7)
-
Step 300
300
#B5C9A1
oklch(81% 0.059 129.3)
-
Step 400
400
#8EAC6D
oklch(70.6% 0.093 129.2)
-
Step 500
500
#729744
oklch(63% 0.119 129.3)
-
Step 600
600 (this color)
#638B2D
oklch(58.7% 0.131 129.5)
-
Step 700
700
#4A6D13
oklch(49% 0.121 129.3)
-
Step 800
800
#3D5914
oklch(42.7% 0.1 129.3)
-
Step 900
900
#344918
oklch(37.6% 0.078 129.1)
-
Step 950
950
#1F2B0F
oklch(27% 0.05 128.5)
#638B2D 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) | #928120 | 0.068 |
| Deuteranopia (no green cones) | #8C7E35 | 0.069 |
| Tritanopia (no blue cones) | #668578 | 0.102 |
| Achromatopsia (no color) | #7F7F7F | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638B2D
#638B2D
oklch(58.7% 0.131 129.5)
- #9464B6
#9464B6
oklch(58.7% 0.131 309.9)
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 #638B2D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mossy Green #638B27 ΔE 0.005
- Moss Green #658B38 ΔE 0.011
- Olive Drab #6B8E23 ΔE 0.016
- Sap Green #5C8B15 ΔE 0.019
- Fern Green #548D44 ΔE 0.023
- Swamp Green #748500 ΔE 0.027
- Khaki Green #728639 ΔE 0.029
- Dark Yellow Green #728F02 ΔE 0.030
Use #638B2D 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.