#557C78
Closest named color: Battleship Grey (#6B7C85). oklch(55.6% 0.044 188), rgb(85, 124, 120).
Aa
White text reads best on this color (4.62:1).
About this color
#557C78 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 56%, its chroma 0.044 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Grey (#6B7C85), ΔE 0.037 away. White text reads best on it, at 4.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Battleship Grey (#6B7C85) |
| Black text | 4.54:1 |
| White text | 4.62:1 |
Values
| HEX | #557C78 |
| RGB | rgb(85, 124, 120) |
| HSL | hsl(174, 19%, 41%) |
| OKLCH | oklch(55.6% 0.044 188) |
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 #557C78 | 4.62:1 | AA | Lc -77.5 | Fine for body text |
| Black text on #557C78 | 4.54:1 | AA | Lc 32.0 | Non-text elements, placeholder text |
| #557C78 text on white | 4.62:1 | AA | Lc 72.1 | Content text, not long reading |
| #557C78 text on black | 4.54:1 | AA | Lc -29.6 | 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
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D1DCDA
oklch(88.6% 0.012 184)
-
Step 300
300
#B3C5C3
oklch(80.9% 0.02 188.7)
-
Step 400
400
#8BA7A4
oklch(70.6% 0.031 188.5)
-
Step 500
500
#6E928E
oklch(63.2% 0.04 187.7)
-
Step 600
600 (this color)
#557C78
oklch(55.6% 0.044 188)
-
Step 700
700
#456865
oklch(49% 0.041 189.2)
-
Step 800
800
#395552
oklch(42.6% 0.034 187.6)
-
Step 900
900
#314644
oklch(37.6% 0.027 188.8)
-
Step 950
950
#1D2928
oklch(26.9% 0.017 189.9)
#557C78 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) | #787878 | 0.047 |
| Deuteranopia (no green cones) | #717379 | 0.044 |
| Tritanopia (no blue cones) | #487E7B | 0.014 |
| Achromatopsia (no color) | #757575 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #557C78
#557C78
oklch(55.6% 0.044 188)
- #8B696E
#8B696E
oklch(55.6% 0.044 8.8)
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 #557C78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Grey #6B7C85 ΔE 0.037
- Battleship Gray #6C757D ΔE 0.038
- Grey Blue #647D8E ΔE 0.041
- Steel Grey #6F828A ΔE 0.048
- Teal #008080 ΔE 0.051
- Metallic Blue #4F738E ΔE 0.051
- Slate Gray #708090 ΔE 0.054
- Bluegreen #017A79 ΔE 0.056
Use #557C78 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.