#638820
Closest named color: Mossy Green (#638B27). oklch(57.9% 0.136 127.6), rgb(99, 136, 32).
Aa
Black text reads best on this color (5.07:1).
About this color
#638820 is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.136 and its hue 128°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Mossy Green (#638B27), ΔE 0.009 away. Black text reads best on it, at 5.07:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.136) |
| Temperature | in between |
| Nearest name | Mossy Green (#638B27) |
| Black text | 5.07:1 |
| White text | 4.13:1 |
Values
| HEX | #638820 |
| RGB | rgb(99, 136, 32) |
| HSL | hsl(81, 62%, 33%) |
| OKLCH | oklch(57.9% 0.136 127.6) |
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 #638820 | 4.13:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #638820 | 5.07:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #638820 text on white | 4.13:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #638820 text on black | 5.07:1 | AA | Lc -33.3 | 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
#F4F7F1
oklch(97.2% 0.009 128.6)
-
Step 100
100
#E6ECE0
oklch(93.5% 0.017 128.7)
-
Step 200
200
#D3DEC6
oklch(88.6% 0.034 127.3)
-
Step 300
300
#B5C99F
oklch(81% 0.061 128.4)
-
Step 400
400
#8FAC69
oklch(70.6% 0.097 127.8)
-
Step 500
500
#74973E
oklch(63.1% 0.124 127.6)
-
Step 600
600 (this color)
#638820
oklch(57.9% 0.136 127.6)
-
Step 700
700
#4C6D04
oklch(49.1% 0.126 127.7)
-
Step 800
800
#3F590B
oklch(42.7% 0.104 127.4)
-
Step 900
900
#354914
oklch(37.6% 0.081 127.6)
-
Step 950
950
#1F2B0D
oklch(27% 0.052 127.7)
#638820 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) | #8F7E09 | 0.065 |
| Deuteranopia (no green cones) | #8A7C2A | 0.066 |
| Tritanopia (no blue cones) | #678274 | 0.107 |
| Achromatopsia (no color) | #7D7D7D | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638820
#638820
oklch(57.9% 0.136 127.6)
- #9061B7
#9061B7
oklch(57.8% 0.136 307.9)
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 #638820, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mossy Green #638B27 ΔE 0.009
- Sap Green #5C8B15 ΔE 0.015
- Moss Green #658B38 ΔE 0.020
- Olive Drab #6B8E23 ΔE 0.021
- Swamp Green #748500 ΔE 0.022
- Fern Green #548D44 ΔE 0.031
- Swamp #698339 ΔE 0.031
- Dark Yellow Green #728F02 ΔE 0.032
Use #638820 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.