#557178
Closest named color: Metallic Blue (#4F738E). oklch(52.9% 0.034 214.8), rgb(85, 113, 120).
Aa
White text reads best on this color (5.22:1).
About this color
#557178 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 53%, its chroma 0.034 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.034 away. White text reads best on it, at 5.22:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.01:1 |
| White text | 5.22:1 |
Values
| HEX | #557178 |
| RGB | rgb(85, 113, 120) |
| HSL | hsl(192, 17%, 40%) |
| OKLCH | oklch(52.9% 0.034 214.8) |
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 #557178 | 5.22:1 | AA | Lc -81.3 | Fine for body text |
| Black text on #557178 | 4.01:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #557178 text on white | 5.22:1 | AA | Lc 75.9 | Fine for body text |
| #557178 text on black | 4.01:1 | AA large text | Lc -25.8 | 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
#E7EBEC
oklch(93.7% 0.005 214.3)
-
Step 200
200
#D3DBDD
oklch(88.6% 0.009 214.3)
-
Step 300
300
#B6C3C7
oklch(80.8% 0.015 218.1)
-
Step 400
400
#90A5AA
oklch(70.7% 0.025 213.7)
-
Step 500
500
#748F95
oklch(63.1% 0.032 212.7)
-
Step 600
600 (this color)
#557178
oklch(52.9% 0.034 214.8)
-
Step 700
700
#4C666C
oklch(49.2% 0.032 213.4)
-
Step 800
800
#3F5358
oklch(42.7% 0.026 214.7)
-
Step 900
900
#354548
oklch(37.8% 0.021 210.3)
-
Step 950
950
#1F282A
oklch(26.9% 0.013 212.7)
#557178 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) | #6C6F78 | 0.032 |
| Deuteranopia (no green cones) | #666A78 | 0.030 |
| Tritanopia (no blue cones) | #4A7473 | 0.019 |
| Achromatopsia (no color) | #6C6C6C | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #557178
#557178
oklch(52.9% 0.034 214.8)
- #7E655E
#7E655E
oklch(52.9% 0.034 36.2)
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 #557178, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.034
- Dim Gray #696969 ΔE 0.035
- Battleship Gray #6C757D ΔE 0.036
- Slate #516572 ΔE 0.036
- Battleship Grey #6B7C85 ΔE 0.048
- Grey Blue #647D8E ΔE 0.049
- Deep Aqua #08787F ΔE 0.055
- Dull Blue #49759C ΔE 0.055
Use #557178 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.