#557B75
Closest named color: Battleship Gray (#6C757D). oklch(55.3% 0.044 183.8), rgb(85, 123, 117).
Aa
White text reads best on this color (4.69:1).
About this color
#557B75 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 55%, its chroma 0.044 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Battleship Gray (#6C757D), ΔE 0.039 away. White text reads best on it, at 4.69:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Battleship Gray (#6C757D) |
| Black text | 4.47:1 |
| White text | 4.69:1 |
Values
| HEX | #557B75 |
| RGB | rgb(85, 123, 117) |
| HSL | hsl(171, 18%, 41%) |
| OKLCH | oklch(55.3% 0.044 183.8) |
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 #557B75 | 4.69:1 | AA | Lc -78.0 | Fine for body text |
| Black text on #557B75 | 4.47:1 | AA large text | Lc 31.5 | Non-text elements, placeholder text |
| #557B75 text on white | 4.69:1 | AA | Lc 72.5 | Content text, not long reading |
| #557B75 text on black | 4.47:1 | AA large text | Lc -29.1 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D2DCDA
oklch(88.6% 0.011 182.8)
-
Step 300
300
#B3C5C2
oklch(80.9% 0.02 184.8)
-
Step 400
400
#8CA7A3
oklch(70.7% 0.03 185.6)
-
Step 500
500
#6E928C
oklch(63.1% 0.041 183.6)
-
Step 600
600 (this color)
#557B75
oklch(55.3% 0.044 183.8)
-
Step 700
700
#466963
oklch(49.2% 0.041 182.7)
-
Step 800
800
#3A5551
oklch(42.7% 0.033 184.6)
-
Step 900
900
#324643
oklch(37.6% 0.026 184.7)
-
Step 950
950
#1D2927
oklch(26.9% 0.017 183.7)
#557B75 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) | #777775 | 0.046 |
| Deuteranopia (no green cones) | #707276 | 0.043 |
| Tritanopia (no blue cones) | #497D79 | 0.013 |
| Achromatopsia (no color) | #747474 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #557B75
#557B75
oklch(55.3% 0.044 183.8)
- #89686F
#89686F
oklch(55.2% 0.043 4.5)
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 #557B75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Battleship Gray #6C757D ΔE 0.039
- Battleship Grey #6B7C85 ΔE 0.040
- Grey Blue #647D8E ΔE 0.045
- Steel Grey #6F828A ΔE 0.051
- Teal #008080 ΔE 0.051
- Metallic Blue #4F738E ΔE 0.053
- Dim Gray #696969 ΔE 0.054
- Bluegreen #017A79 ΔE 0.055
Use #557B75 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.