#556C77
Closest named color: Slate (#516572). oklch(51.7% 0.032 228.6), rgb(85, 108, 119).
Aa
White text reads best on this color (5.52:1).
About this color
#556C77 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.032 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.022 away. White text reads best on it, at 5.52:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.79:1 |
| White text | 5.52:1 |
Values
| HEX | #556C77 |
| RGB | rgb(85, 108, 119) |
| HSL | hsl(199, 17%, 40%) |
| OKLCH | oklch(51.7% 0.032 228.6) |
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 #556C77 | 5.52:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #556C77 | 3.79:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #556C77 text on white | 5.52:1 | AA | Lc 77.6 | Fine for body text |
| #556C77 text on black | 3.79:1 | AA large text | Lc -24.2 | 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 700.
-
Step 50
50
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EAEC
oklch(93.5% 0.004 236.5)
-
Step 200
200
#D4DADE
oklch(88.5% 0.009 236.6)
-
Step 300
300
#B7C3C9
oklch(81% 0.016 229)
-
Step 400
400
#91A4AD
oklch(70.7% 0.025 227.9)
-
Step 500
500
#768E99
oklch(63.2% 0.032 227.3)
-
Step 600
600
#5E7884
oklch(55.7% 0.035 227.8)
-
Step 700
700 (this color)
#556C77
oklch(51.7% 0.032 228.6)
-
Step 800
800
#40525B
oklch(42.7% 0.027 229.8)
-
Step 900
900
#36444A
oklch(37.7% 0.021 225.8)
-
Step 950
950
#20282C
oklch(27.1% 0.014 229.5)
#556C77 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) | #666B78 | 0.024 |
| Deuteranopia (no green cones) | #616777 | 0.021 |
| Tritanopia (no blue cones) | #4B6F6F | 0.022 |
| Achromatopsia (no color) | #696969 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556C77
#556C77
oklch(51.7% 0.032 228.6)
- #786358
#786358
oklch(51.7% 0.032 49.2)
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 #556C77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.022
- Dim Gray #696969 ΔE 0.033
- Metallic Blue #4F738E ΔE 0.036
- Battleship Gray #6C757D ΔE 0.044
- Dull Blue #49759C ΔE 0.057
- Denim #3B638C ΔE 0.059
- Battleship Grey #6B7C85 ΔE 0.059
- Grey Blue #647D8E ΔE 0.060
Use #556C77 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.