#638951
Closest named color: Dark Sage (#598556). oklch(58.7% 0.092 136.1), rgb(99, 137, 81).
Aa
Black text reads best on this color (5.22:1).
About this color
#638951 is a medium-dark, moderately saturated green. In OKLCH its lightness is 59%, its chroma 0.092 and its hue 136°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Sage (#598556), ΔE 0.020 away. Black text reads best on it, at 5.22:1.
| Hue family | Greens |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.092) |
| Temperature | in between |
| Nearest name | Dark Sage (#598556) |
| Black text | 5.22:1 |
| White text | 4.01:1 |
Values
| HEX | #638951 |
| RGB | rgb(99, 137, 81) |
| HSL | hsl(101, 26%, 43%) |
| OKLCH | oklch(58.7% 0.092 136.1) |
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 #638951 | 4.01:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #638951 | 5.22:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #638951 text on white | 4.01:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #638951 text on black | 5.22:1 | AA | Lc -34.3 | 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
#E6ECE4
oklch(93.6% 0.012 137.8)
-
Step 200
200
#D2DDCE
oklch(88.5% 0.023 137.3)
-
Step 300
300
#B5C7AD
oklch(80.9% 0.041 136)
-
Step 400
400
#8EAB81
oklch(70.8% 0.068 136.1)
-
Step 500
500
#729562
oklch(63% 0.083 136.2)
-
Step 600
600 (this color)
#638951
oklch(58.7% 0.092 136.1)
-
Step 700
700
#4A6C39
oklch(49.2% 0.086 135.9)
-
Step 800
800
#3D5830
oklch(42.8% 0.071 136.1)
-
Step 900
900
#34482A
oklch(37.6% 0.055 135.7)
-
Step 950
950
#1F2A19
oklch(26.9% 0.034 134.9)
#638951 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) | #8D814D | 0.060 |
| Deuteranopia (no green cones) | #877E54 | 0.059 |
| Tritanopia (no blue cones) | #62857B | 0.065 |
| Achromatopsia (no color) | #7F7F7F | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638951
#638951
oklch(58.7% 0.092 136.1)
- #926BA1
#926BA1
oklch(58.7% 0.092 316.4)
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 #638951, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sage #598556 ΔE 0.020
- Swamp #698339 ΔE 0.027
- Khaki Green #728639 ΔE 0.028
- Light Forest Green #4F9153 ΔE 0.029
- Fern Green #548D44 ΔE 0.030
- Moss Green #658B38 ΔE 0.030
- Slate Green #658D6D ΔE 0.037
- Military Green #667C3E ΔE 0.038
Use #638951 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.