#577E81
Closest named color: Battleship Grey (#6B7C85). oklch(56.5% 0.044 202), rgb(87, 126, 129).
Aa
Black text reads best on this color (4.70:1).
About this color
#577E81 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 57%, its chroma 0.044 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Grey (#6B7C85), ΔE 0.027 away. Black text reads best on it, at 4.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Battleship Grey (#6B7C85) |
| Black text | 4.70:1 |
| White text | 4.46:1 |
Values
| HEX | #577E81 |
| RGB | rgb(87, 126, 129) |
| HSL | hsl(184, 19%, 42%) |
| OKLCH | oklch(56.5% 0.044 202) |
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 #577E81 | 4.46:1 | AA large text | Lc -76.4 | Fine for body text |
| Black text on #577E81 | 4.70:1 | AA | Lc 33.2 | Non-text elements, placeholder text |
| #577E81 text on white | 4.46:1 | AA large text | Lc 70.9 | Content text, not long reading |
| #577E81 text on black | 4.70:1 | AA | Lc -30.7 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D1DBDC
oklch(88.4% 0.011 204.1)
-
Step 300
300
#B3C5C6
oklch(81% 0.02 200.8)
-
Step 400
400
#8AA7A9
oklch(70.7% 0.032 201.6)
-
Step 500
500
#6D9194
oklch(63.1% 0.04 202.6)
-
Step 600
600 (this color)
#577E81
oklch(56.5% 0.044 202)
-
Step 700
700
#44686B
oklch(49.1% 0.041 202.5)
-
Step 800
800
#395557
oklch(42.8% 0.034 201.6)
-
Step 900
900
#314648
oklch(37.7% 0.026 203.5)
-
Step 950
950
#1D292A
oklch(27% 0.017 202.6)
#577E81 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) | #787B81 | 0.044 |
| Deuteranopia (no green cones) | #717581 | 0.041 |
| Tritanopia (no blue cones) | #48817F | 0.019 |
| Achromatopsia (no color) | #777777 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577E81
#577E81
oklch(56.5% 0.044 202)
- #8E6C6A
#8E6C6A
oklch(56.5% 0.044 22.4)
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 #577E81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Grey #6B7C85 ΔE 0.027
- Grey Blue #647D8E ΔE 0.028
- Battleship Gray #6C757D ΔE 0.034
- Steel Grey #6F828A ΔE 0.037
- Slate Gray #708090 ΔE 0.042
- Metallic Blue #4F738E ΔE 0.046
- Stormy Blue #507B9C ΔE 0.046
- Cerulean #457B9D ΔE 0.050
Use #577E81 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.