#556E7B
Closest named color: Slate (#516572). oklch(52.3% 0.036 230.9), rgb(85, 110, 123).
Aa
White text reads best on this color (5.38:1).
About this color
#556E7B is a medium-dark, muted blue. In OKLCH its lightness is 52%, its chroma 0.036 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.028 away. White text reads best on it, at 5.38:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.90:1 |
| White text | 5.38:1 |
Values
| HEX | #556E7B |
| RGB | rgb(85, 110, 123) |
| HSL | hsl(201, 18%, 41%) |
| OKLCH | oklch(52.3% 0.036 230.9) |
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 #556E7B | 5.38:1 | AA | Lc -82.1 | Fine for body text |
| Black text on #556E7B | 3.90:1 | AA large text | Lc 27.3 | Dividers and decoration only |
| #556E7B text on white | 5.38:1 | AA | Lc 76.8 | Fine for body text |
| #556E7B text on black | 3.90:1 | AA large text | Lc -25.0 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D3DADE
oklch(88.4% 0.009 232.4)
-
Step 300
300
#B6C3CA
oklch(80.9% 0.017 231)
-
Step 400
400
#90A4AF
oklch(70.7% 0.028 231.8)
-
Step 500
500
#748E9B
oklch(63.1% 0.035 229.6)
-
Step 600
600
#5D7886
oklch(55.7% 0.038 230.8)
-
Step 700
700 (this color)
#556E7B
oklch(52.3% 0.036 230.9)
-
Step 800
800
#3F525C
oklch(42.7% 0.029 231.2)
-
Step 900
900
#35444C
oklch(37.7% 0.024 231.5)
-
Step 950
950
#1F282C
oklch(27% 0.015 226.6)
#556E7B 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) | #686D7C | 0.026 |
| Deuteranopia (no green cones) | #62687B | 0.024 |
| Tritanopia (no blue cones) | #497272 | 0.026 |
| Achromatopsia (no color) | #6A6A6A | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556E7B
#556E7B
oklch(52.3% 0.036 230.9)
- #7B6457
#7B6457
oklch(52.2% 0.036 51.1)
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 #556E7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.028
- Metallic Blue #4F738E ΔE 0.029
- Dim Gray #696969 ΔE 0.036
- Battleship Gray #6C757D ΔE 0.040
- Dull Blue #49759C ΔE 0.051
- Grey Blue #647D8E ΔE 0.053
- Battleship Grey #6B7C85 ΔE 0.054
- Stormy Blue #507B9C ΔE 0.055
Use #556E7B 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.