#557E78
Closest named color: Battleship Grey (#6B7C85). oklch(56.1% 0.047 184.6), rgb(85, 126, 120).
Aa
Black text reads best on this color (4.64:1).
About this color
#557E78 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 56%, its chroma 0.047 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Grey (#6B7C85), ΔE 0.038 away. Black text reads best on it, at 4.64:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Battleship Grey (#6B7C85) |
| Black text | 4.64:1 |
| White text | 4.52:1 |
Values
| HEX | #557E78 |
| RGB | rgb(85, 126, 120) |
| HSL | hsl(171, 19%, 41%) |
| OKLCH | oklch(56.1% 0.047 184.6) |
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 #557E78 | 4.52:1 | AA | Lc -76.8 | Fine for body text |
| Black text on #557E78 | 4.64:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #557E78 text on white | 4.52:1 | AA | Lc 71.4 | Content text, not long reading |
| #557E78 text on black | 4.64:1 | AA | Lc -30.3 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D1DCDA
oklch(88.6% 0.012 184)
-
Step 300
300
#B2C5C2
oklch(80.8% 0.021 185.4)
-
Step 400
400
#8AA8A3
oklch(70.7% 0.034 184.1)
-
Step 500
500
#6C928D
oklch(63% 0.043 186.1)
-
Step 600
600 (this color)
#557E78
oklch(56.1% 0.047 184.6)
-
Step 700
700
#446964
oklch(49.1% 0.043 185.3)
-
Step 800
800
#385651
oklch(42.8% 0.037 183)
-
Step 900
900
#314743
oklch(37.8% 0.028 182.2)
-
Step 950
950
#1D2927
oklch(26.9% 0.017 183.7)
#557E78 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) | #7A7A78 | 0.049 |
| Deuteranopia (no green cones) | #737479 | 0.048 |
| Tritanopia (no blue cones) | #48807C | 0.014 |
| Achromatopsia (no color) | #767676 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #557E78
#557E78
oklch(56.1% 0.047 184.6)
- #8D6A71
#8D6A71
oklch(56.2% 0.046 5.3)
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 #557E78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Grey #6B7C85 ΔE 0.038
- Battleship Gray #6C757D ΔE 0.041
- Grey Blue #647D8E ΔE 0.042
- Steel Grey #6F828A ΔE 0.046
- Teal #008080 ΔE 0.051
- Dusty Teal #4C9085 ΔE 0.051
- Slate Gray #708090 ΔE 0.053
- Medium Grey #7D7F7C ΔE 0.055
Use #557E78 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.