#556178
Closest named color: Slate (#516572). oklch(49.1% 0.04 263.3), rgb(85, 97, 120).
Aa
White text reads best on this color (6.23:1).
About this color
#556178 is a medium-dark, muted blue. In OKLCH its lightness is 49%, its chroma 0.040 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.019 away. White text reads best on it, at 6.23:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.36:1 |
| White text | 6.23:1 |
Values
| HEX | #556178 |
| RGB | rgb(85, 97, 120) |
| HSL | hsl(219, 17%, 40%) |
| OKLCH | oklch(49.1% 0.04 263.3) |
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 #556178 | 6.23:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #556178 | 3.36:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #556178 text on white | 6.23:1 | AA | Lc 81.1 | Fine for body text |
| #556178 text on black | 3.36:1 | AA large text | Lc -20.8 | 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
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D5D9E0
oklch(88.4% 0.011 261.8)
-
Step 300
300
#BAC1CD
oklch(80.9% 0.019 261.3)
-
Step 400
400
#97A1B4
oklch(70.7% 0.03 263.4)
-
Step 500
500
#7D8AA2
oklch(63.1% 0.039 262.7)
-
Step 600
600
#66748D
oklch(55.7% 0.042 262)
-
Step 700
700 (this color)
#556178
oklch(49.1% 0.04 263.3)
-
Step 800
800
#464F62
oklch(42.7% 0.034 265.1)
-
Step 900
900
#3A4250
oklch(37.7% 0.026 261.6)
-
Step 950
950
#22272F
oklch(27.1% 0.017 259.8)
#556178 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) | #5A6279 | 0.008 |
| Deuteranopia (no green cones) | #565F77 | 0.006 |
| Tritanopia (no blue cones) | #4B6669 | 0.036 |
| Achromatopsia (no color) | #616161 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556178
#556178
oklch(49.1% 0.04 263.3)
- #6C5F47
#6C5F47
oklch(49.1% 0.04 82.6)
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 #556178, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.019
- Dusty Grape #545775 ΔE 0.029
- YInMn Blue #415A77 ΔE 0.037
- Denim #3B638C ΔE 0.042
- Dusk #4E5481 ΔE 0.047
- Dim Gray #696969 ΔE 0.050
- Dusky Blue #475F94 ΔE 0.050
- Metallic Blue #4F738E ΔE 0.055
Use #556178 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.