#639973
Closest named color: Green Grey (#77926F). oklch(63.4% 0.081 153), rgb(99, 153, 115).
Aa
Black text reads best on this color (6.33:1).
About this color
#639973 is a medium-light, moderately saturated green. In OKLCH its lightness is 63%, its chroma 0.081 and its hue 153°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Green Grey (#77926F), ΔE 0.028 away. Black text reads best on it, at 6.33:1.
| Hue family | Greens |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.081) |
| Temperature | in between |
| Nearest name | Green Grey (#77926F) |
| Black text | 6.33:1 |
| White text | 3.31:1 |
Values
| HEX | #639973 |
| RGB | rgb(99, 153, 115) |
| HSL | hsl(138, 21%, 49%) |
| OKLCH | oklch(63.4% 0.081 153) |
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 #639973 | 3.31:1 | AA large text | Lc -65.9 | Content text, not long reading |
| Black text on #639973 | 6.33:1 | AA | Lc 43.6 | Non-text elements, placeholder text |
| #639973 text on white | 3.31:1 | AA large text | Lc 60.5 | Content text, not long reading |
| #639973 text on black | 6.33:1 | AA | Lc -41.2 | 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 500.
-
Step 50
50
#F3F6F4
oklch(97% 0.004 157.2)
-
Step 100
100
#E4ECE6
oklch(93.5% 0.012 153.7)
-
Step 200
200
#CFDED2
oklch(88.6% 0.023 151.6)
-
Step 300
300
#AEC8B5
oklch(80.8% 0.039 153.7)
-
Step 400
400
#83AD8E
oklch(70.8% 0.064 152.6)
-
Step 500
500 (this color)
#639973
oklch(63.4% 0.081 153)
-
Step 600
600
#47825A
oklch(55.5% 0.088 153)
-
Step 700
700
#386E4A
oklch(49% 0.082 153.1)
-
Step 800
800
#2F5A3D
oklch(42.8% 0.068 153.1)
-
Step 900
900
#2A4A34
oklch(37.7% 0.054 153.2)
-
Step 950
950
#192B1F
oklch(26.9% 0.033 154.5)
#639973 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) | #999171 | 0.071 |
| Deuteranopia (no green cones) | #908B75 | 0.069 |
| Tritanopia (no blue cones) | #5A988F | 0.042 |
| Achromatopsia (no color) | #8D8D8D | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #639973
#639973
oklch(63.4% 0.081 153)
- #A878A0
#A878A0
oklch(63.4% 0.081 332.5)
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 #639973, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Green Grey #77926F ΔE 0.028
- Grey Teal #5E9B8A ΔE 0.031
- Slate Green #658D6D ΔE 0.034
- Ocean Green #3D9973 ΔE 0.034
- Dull Teal #5F9E8F ΔE 0.038
- Moss #769958 ΔE 0.038
- Greeny Grey #7EA07A ΔE 0.041
- Drab Green #749551 ΔE 0.042
Use #639973 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.