#556579
Closest named color: Slate (#516572). oklch(50.1% 0.038 254.2), rgb(85, 101, 121).
Aa
White text reads best on this color (5.95:1).
About this color
#556579 is a medium-dark, muted blue. In OKLCH its lightness is 50%, its chroma 0.038 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.013 away. White text reads best on it, at 5.95:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.52:1 |
| White text | 5.95:1 |
Values
| HEX | #556579 |
| RGB | rgb(85, 101, 121) |
| HSL | hsl(213, 17%, 40%) |
| OKLCH | oklch(50.1% 0.038 254.2) |
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 #556579 | 5.95:1 | AA | Lc -85.0 | Fine for body text |
| Black text on #556579 | 3.52:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #556579 text on white | 5.95:1 | AA | Lc 79.8 | Fine for body text |
| #556579 text on black | 3.52:1 | AA large text | Lc -22.0 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D5DAE0
oklch(88.6% 0.01 252.8)
-
Step 300
300
#B9C1CC
oklch(80.8% 0.018 256.3)
-
Step 400
400
#95A2B3
oklch(70.8% 0.029 255.1)
-
Step 500
500
#7A8BA0
oklch(63.1% 0.037 253.8)
-
Step 600
600
#63758B
oklch(55.6% 0.04 253.6)
-
Step 700
700 (this color)
#556579
oklch(50.1% 0.038 254.2)
-
Step 800
800
#435060
oklch(42.6% 0.031 253.8)
-
Step 900
900
#39424E
oklch(37.6% 0.024 255.7)
-
Step 950
950
#21272E
oklch(27% 0.016 252.4)
#556579 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) | #5E667A | 0.014 |
| Deuteranopia (no green cones) | #5A6279 | 0.011 |
| Tritanopia (no blue cones) | #4B696C | 0.031 |
| Achromatopsia (no color) | #646464 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556579
#556579
oklch(50.1% 0.038 254.2)
- #71614C
#71614C
oklch(50.2% 0.038 74.3)
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 #556579, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.013
- Dusty Grape #545775 ΔE 0.041
- Dim Gray #696969 ΔE 0.042
- Denim #3B638C ΔE 0.045
- Metallic Blue #4F738E ΔE 0.045
- YInMn Blue #415A77 ΔE 0.045
- Dusky Blue #475F94 ΔE 0.055
- Dusk #4E5481 ΔE 0.058
Use #556579 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.