#556A7D
Closest named color: Slate (#516572). oklch(51.4% 0.039 246), rgb(85, 106, 125).
Aa
White text reads best on this color (5.60:1).
About this color
#556A7D is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.039 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.021 away. White text reads best on it, at 5.60:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.74:1 |
| White text | 5.60:1 |
Values
| HEX | #556A7D |
| RGB | rgb(85, 106, 125) |
| HSL | hsl(208, 19%, 41%) |
| OKLCH | oklch(51.4% 0.039 246) |
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 #556A7D | 5.60:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #556A7D | 3.74:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #556A7D text on white | 5.60:1 | AA | Lc 78.0 | Fine for body text |
| #556A7D text on black | 3.74:1 | AA large text | Lc -23.7 | 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
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D4DAE0
oklch(88.6% 0.011 247.9)
-
Step 300
300
#B7C2CC
oklch(80.9% 0.019 245.4)
-
Step 400
400
#92A3B3
oklch(70.7% 0.03 246.6)
-
Step 500
500
#778CA0
oklch(63.1% 0.039 247.1)
-
Step 600
600
#5F768B
oklch(55.5% 0.043 246.2)
-
Step 700
700 (this color)
#556A7D
oklch(51.4% 0.039 246)
-
Step 800
800
#405160
oklch(42.7% 0.033 245.3)
-
Step 900
900
#37434E
oklch(37.7% 0.025 246.2)
-
Step 950
950
#20272E
oklch(26.9% 0.016 248.4)
#556A7D 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) | #636A7E | 0.020 |
| Deuteranopia (no green cones) | #5D667D | 0.015 |
| Tritanopia (no blue cones) | #496E70 | 0.032 |
| Achromatopsia (no color) | #686868 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556A7D
#556A7D
oklch(51.4% 0.039 246)
- #776350
#776350
oklch(51.4% 0.039 65.3)
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 #556A7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.021
- Metallic Blue #4F738E ΔE 0.032
- Dim Gray #696969 ΔE 0.040
- Denim #3B638C ΔE 0.049
- Battleship Gray #6C757D ΔE 0.049
- Dull Blue #49759C ΔE 0.051
- Dusty Grape #545775 ΔE 0.055
- Muted Blue #3B719F ΔE 0.056
Use #556A7D 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.