#557E66
Closest named color: Dark Sage (#598556). oklch(55.6% 0.059 158.1), rgb(85, 126, 102).
Aa
White text reads best on this color (4.60:1).
About this color
#557E66 is a medium-dark, muted green. In OKLCH its lightness is 56%, its chroma 0.059 and its hue 158°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Sage (#598556), ΔE 0.036 away. White text reads best on it, at 4.60:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.059) |
| Temperature | in between |
| Nearest name | Dark Sage (#598556) |
| Black text | 4.56:1 |
| White text | 4.60:1 |
Values
| HEX | #557E66 |
| RGB | rgb(85, 126, 102) |
| HSL | hsl(145, 19%, 41%) |
| OKLCH | oklch(55.6% 0.059 158.1) |
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 #557E66 | 4.60:1 | AA | Lc -77.4 | Fine for body text |
| Black text on #557E66 | 4.56:1 | AA | Lc 32.2 | Non-text elements, placeholder text |
| #557E66 text on white | 4.60:1 | AA | Lc 71.9 | Content text, not long reading |
| #557E66 text on black | 4.56:1 | AA | Lc -29.8 | Dividers and decoration only |
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
#F3F6F4
oklch(97% 0.004 157.2)
-
Step 100
100
#E6EBE8
oklch(93.5% 0.007 160.1)
-
Step 200
200
#D1DCD5
oklch(88.4% 0.015 158.2)
-
Step 300
300
#B3C6BA
oklch(80.9% 0.027 158.1)
-
Step 400
400
#8BA997
oklch(70.7% 0.042 158.8)
-
Step 500
500
#6E947D
oklch(63.1% 0.054 157.8)
-
Step 600
600 (this color)
#557E66
oklch(55.6% 0.059 158.1)
-
Step 700
700
#456A55
oklch(49% 0.054 158.7)
-
Step 800
800
#395745
oklch(42.7% 0.047 157.4)
-
Step 900
900
#31473A
oklch(37.5% 0.035 158.2)
-
Step 950
950
#1D2A22
oklch(27% 0.023 157.4)
#557E66 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) | #7D7865 | 0.055 |
| Deuteranopia (no green cones) | #767367 | 0.053 |
| Tritanopia (no blue cones) | #4D7D77 | 0.028 |
| Achromatopsia (no color) | #757575 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #557E66
#557E66
oklch(55.6% 0.059 158.1)
- #8B667F
#8B667F
oklch(55.6% 0.059 338.9)
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 #557E66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sage #598556 ΔE 0.036
- Slate Green #658D6D ΔE 0.050
- Military Green #667C3E ΔE 0.052
- Dusty Teal #4C9085 ΔE 0.058
- Teal #008080 ΔE 0.059
- Battleship Grey #6B7C85 ΔE 0.060
- Battleship Gray #6C757D ΔE 0.061
- Sea Green #2E8B57 ΔE 0.061
Use #557E66 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.