#557278
Closest named color: Metallic Blue (#4F738E). oklch(53.2% 0.035 211.8), rgb(85, 114, 120).
Aa
White text reads best on this color (5.16:1).
About this color
#557278 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 53%, its chroma 0.035 and its hue 212°. 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 5.16:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.06:1 |
| White text | 5.16:1 |
Values
| HEX | #557278 |
| RGB | rgb(85, 114, 120) |
| HSL | hsl(190, 17%, 40%) |
| OKLCH | oklch(53.2% 0.035 211.8) |
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 #557278 | 5.16:1 | AA | Lc -80.9 | Fine for body text |
| Black text on #557278 | 4.06:1 | AA large text | Lc 28.5 | Dividers and decoration only |
| #557278 text on white | 5.16:1 | AA | Lc 75.6 | Fine for body text |
| #557278 text on black | 4.06:1 | AA large text | Lc -26.2 | 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
#E7EBEB
oklch(93.7% 0.004 197.1)
-
Step 200
200
#D3DBDC
oklch(88.6% 0.009 205.9)
-
Step 300
300
#B6C3C6
oklch(80.8% 0.015 213.1)
-
Step 400
400
#8FA5AA
oklch(70.7% 0.026 213)
-
Step 500
500
#748F95
oklch(63.1% 0.032 212.7)
-
Step 600
600 (this color)
#557278
oklch(53.2% 0.035 211.8)
-
Step 700
700
#4B666B
oklch(49.1% 0.033 210.2)
-
Step 800
800
#3E5358
oklch(42.7% 0.027 213.9)
-
Step 900
900
#354548
oklch(37.8% 0.021 210.3)
-
Step 950
950
#1F282A
oklch(26.9% 0.013 212.7)
#557278 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) | #6D7078 | 0.033 |
| Deuteranopia (no green cones) | #676B78 | 0.031 |
| Tritanopia (no blue cones) | #4A7574 | 0.018 |
| Achromatopsia (no color) | #6D6D6D | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #557278
#557278
oklch(53.2% 0.035 211.8)
- #7F6560
#7F6560
oklch(53.1% 0.035 30.8)
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 #557278, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.034
- Battleship Gray #6C757D ΔE 0.035
- Dim Gray #696969 ΔE 0.037
- Slate #516572 ΔE 0.039
- Battleship Grey #6B7C85 ΔE 0.046
- Grey Blue #647D8E ΔE 0.048
- Deep Aqua #08787F ΔE 0.054
- Stormy Blue #507B9C ΔE 0.055
Use #557278 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.