#638577
Closest named color: Slate Green (#658D6D). oklch(58.7% 0.044 167.6), rgb(99, 133, 119).
Aa
Black text reads best on this color (5.15:1).
About this color
#638577 is a medium-dark, muted green. In OKLCH its lightness is 59%, its chroma 0.044 and its hue 168°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.032 away. Black text reads best on it, at 5.15:1.
| Hue family | Greens |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.044) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #638577 |
| RGB | rgb(99, 133, 119) |
| HSL | hsl(155, 15%, 45%) |
| OKLCH | oklch(58.7% 0.044 167.6) |
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 #638577 | 4.07:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #638577 | 5.15:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #638577 text on white | 4.07:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #638577 text on black | 5.15:1 | AA | Lc -33.7 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E6EBE9
oklch(93.6% 0.006 170.4)
-
Step 200
200
#D3DBD8
oklch(88.4% 0.01 171.8)
-
Step 300
300
#B5C5BE
oklch(80.9% 0.02 167.8)
-
Step 400
400
#8EA79D
oklch(70.6% 0.031 169.3)
-
Step 500
500
#729285
oklch(63.2% 0.041 168.3)
-
Step 600
600 (this color)
#638577
oklch(58.7% 0.044 167.6)
-
Step 700
700
#4A685C
oklch(49% 0.04 168)
-
Step 800
800
#3D554B
oklch(42.7% 0.034 167.2)
-
Step 900
900
#34463F
oklch(37.6% 0.026 169.1)
-
Step 950
950
#1F2925
oklch(27% 0.016 168.8)
#638577 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) | #838076 | 0.045 |
| Deuteranopia (no green cones) | #7D7C78 | 0.043 |
| Tritanopia (no blue cones) | #5B8581 | 0.017 |
| Achromatopsia (no color) | #7E7E7E | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638577
#638577
oklch(58.7% 0.044 167.6)
- #917281
#917281
oklch(58.7% 0.044 347.9)
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 #638577, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.032
- Dusty Teal #4C9085 ΔE 0.036
- Steel Grey #6F828A ΔE 0.038
- Medium Grey #7D7F7C ΔE 0.041
- Battleship Grey #6B7C85 ΔE 0.041
- Gray #808080 ΔE 0.046
- Grey Blue #647D8E ΔE 0.049
- Slate Gray #708090 ΔE 0.050
Use #638577 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.