#556A77
Closest named color: Slate (#516572). oklch(51.2% 0.033 235.4), rgb(85, 106, 119).
Aa
White text reads best on this color (5.65:1).
About this color
#556A77 is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.033 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.017 away. White text reads best on it, at 5.65:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.71:1 |
| White text | 5.65:1 |
Values
| HEX | #556A77 |
| RGB | rgb(85, 106, 119) |
| HSL | hsl(203, 17%, 40%) |
| OKLCH | oklch(51.2% 0.033 235.4) |
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 #556A77 | 5.65:1 | AA | Lc -83.5 | Fine for body text |
| Black text on #556A77 | 3.71:1 | AA large text | Lc 25.8 | Dividers and decoration only |
| #556A77 text on white | 5.65:1 | AA | Lc 78.3 | Fine for body text |
| #556A77 text on black | 3.71:1 | AA large text | Lc -23.5 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
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
#B7C2C9
oklch(80.8% 0.016 235.4)
-
Step 400
400
#92A3AE
oklch(70.6% 0.025 236.1)
-
Step 500
500
#778D9B
oklch(63.1% 0.033 236)
-
Step 600
600
#607785
oklch(55.6% 0.035 235)
-
Step 700
700 (this color)
#556A77
oklch(51.2% 0.033 235.4)
-
Step 800
800
#41525C
oklch(42.8% 0.027 234.1)
-
Step 900
900
#37444B
oklch(37.8% 0.021 231.5)
-
Step 950
950
#20282C
oklch(27.1% 0.014 229.5)
#556A77 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) | #646978 | 0.021 |
| Deuteranopia (no green cones) | #5F6577 | 0.019 |
| Tritanopia (no blue cones) | #4B6D6E | 0.024 |
| Achromatopsia (no color) | #676767 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556A77
#556A77
oklch(51.2% 0.033 235.4)
- #766255
#766255
oklch(51.2% 0.033 54.9)
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 #556A77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.017
- Dim Gray #696969 ΔE 0.034
- Metallic Blue #4F738E ΔE 0.038
- Battleship Gray #6C757D ΔE 0.048
- Denim #3B638C ΔE 0.055
- Dusty Grape #545775 ΔE 0.057
- Dull Blue #49759C ΔE 0.058
- YInMn Blue #415A77 ΔE 0.059
Use #556A77 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.