#557B80
Closest named color: Battleship Grey (#6B7C85). oklch(55.6% 0.043 206.3), rgb(85, 123, 128).
Aa
White text reads best on this color (4.63:1).
About this color
#557B80 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 56%, its chroma 0.043 and its hue 206°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Grey (#6B7C85), ΔE 0.030 away. White text reads best on it, at 4.63:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Battleship Grey (#6B7C85) |
| Black text | 4.53:1 |
| White text | 4.63:1 |
Values
| HEX | #557B80 |
| RGB | rgb(85, 123, 128) |
| HSL | hsl(187, 20%, 42%) |
| OKLCH | oklch(55.6% 0.043 206.3) |
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 #557B80 | 4.63:1 | AA | Lc -77.6 | Fine for body text |
| Black text on #557B80 | 4.53:1 | AA | Lc 31.9 | Non-text elements, placeholder text |
| #557B80 text on white | 4.63:1 | AA | Lc 72.2 | Content text, not long reading |
| #557B80 text on black | 4.53:1 | AA | Lc -29.5 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D1DBDD
oklch(88.4% 0.011 211)
-
Step 300
300
#B3C4C7
oklch(80.8% 0.019 209.4)
-
Step 400
400
#8BA7AA
oklch(70.8% 0.031 204.4)
-
Step 500
500
#6D9195
oklch(63.1% 0.04 204.7)
-
Step 600
600 (this color)
#557B80
oklch(55.6% 0.043 206.3)
-
Step 700
700
#45676C
oklch(49% 0.04 207.5)
-
Step 800
800
#395458
oklch(42.6% 0.033 207.5)
-
Step 900
900
#314648
oklch(37.7% 0.026 203.5)
-
Step 950
950
#1D292A
oklch(27% 0.017 202.6)
#557B80 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) | #757880 | 0.042 |
| Deuteranopia (no green cones) | #6E7280 | 0.040 |
| Tritanopia (no blue cones) | #457E7C | 0.021 |
| Achromatopsia (no color) | #757575 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #557B80
#557B80
oklch(55.6% 0.043 206.3)
- #8B6A66
#8B6A66
oklch(55.6% 0.043 26.5)
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 #557B80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Grey #6B7C85 ΔE 0.030
- Grey Blue #647D8E ΔE 0.030
- Battleship Gray #6C757D ΔE 0.032
- Metallic Blue #4F738E ΔE 0.039
- Steel Grey #6F828A ΔE 0.043
- Stormy Blue #507B9C ΔE 0.044
- Slate Gray #708090 ΔE 0.046
- Cerulean #457B9D ΔE 0.047
Use #557B80 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.