#557A79
Closest named color: Battleship Gray (#6C757D). oklch(55.1% 0.042 193.9), rgb(85, 122, 121).
Aa
White text reads best on this color (4.72:1).
About this color
#557A79 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 55%, its chroma 0.042 and its hue 194°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Gray (#6C757D), ΔE 0.034 away. White text reads best on it, at 4.72:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.44:1 |
| White text | 4.72:1 |
Values
| HEX | #557A79 |
| RGB | rgb(85, 122, 121) |
| HSL | hsl(178, 18%, 41%) |
| OKLCH | oklch(55.1% 0.042 193.9) |
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 #557A79 | 4.72:1 | AA | Lc -78.2 | Fine for body text |
| Black text on #557A79 | 4.44:1 | AA large text | Lc 31.3 | Non-text elements, placeholder text |
| #557A79 text on white | 4.72:1 | AA | Lc 72.8 | Content text, not long reading |
| #557A79 text on black | 4.44:1 | AA large text | Lc -28.9 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D2DBDB
oklch(88.5% 0.01 197)
-
Step 300
300
#B3C5C4
oklch(80.9% 0.02 192.7)
-
Step 400
400
#8CA7A6
oklch(70.8% 0.03 193.7)
-
Step 500
500
#6F9190
oklch(63.1% 0.038 194)
-
Step 600
600 (this color)
#557A79
oklch(55.1% 0.042 193.9)
-
Step 700
700
#466867
oklch(49.1% 0.039 193.6)
-
Step 800
800
#3A5554
oklch(42.8% 0.032 193.1)
-
Step 900
900
#324645
oklch(37.7% 0.025 192.3)
-
Step 950
950
#1E2929
oklch(27.1% 0.015 196.3)
#557A79 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) | #757679 | 0.043 |
| Deuteranopia (no green cones) | #6E7179 | 0.041 |
| Tritanopia (no blue cones) | #487C7A | 0.014 |
| Achromatopsia (no color) | #737373 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #557A79
#557A79
oklch(55.1% 0.042 193.9)
- #89686B
#89686B
oklch(55.1% 0.043 12.5)
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 #557A79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Gray #6C757D ΔE 0.034
- Battleship Grey #6B7C85 ΔE 0.036
- Grey Blue #647D8E ΔE 0.039
- Metallic Blue #4F738E ΔE 0.045
- Steel Grey #6F828A ΔE 0.049
- Teal #008080 ΔE 0.052
- Dim Gray #696969 ΔE 0.052
- Slate Gray #708090 ΔE 0.054
Use #557A79 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.