#556E82
Closest named color: Metallic Blue (#4F738E). oklch(52.6% 0.043 242.8), rgb(85, 110, 130).
Aa
White text reads best on this color (5.33:1).
About this color
#556E82 is a medium-dark, muted blue. In OKLCH its lightness is 53%, its chroma 0.043 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.021 away. White text reads best on it, at 5.33:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #556E82 |
| RGB | rgb(85, 110, 130) |
| HSL | hsl(207, 21%, 42%) |
| OKLCH | oklch(52.6% 0.043 242.8) |
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 #556E82 | 5.33:1 | AA | Lc -81.9 | Fine for body text |
| Black text on #556E82 | 3.93:1 | AA large text | Lc 27.6 | Dividers and decoration only |
| #556E82 text on white | 5.33:1 | AA | Lc 76.5 | Fine for body text |
| #556E82 text on black | 3.93:1 | AA large text | Lc -25.2 | 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 600.
-
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
#D3DAE0
oklch(88.5% 0.011 243.7)
-
Step 300
300
#B6C2CC
oklch(80.8% 0.019 243)
-
Step 400
400
#90A3B3
oklch(70.6% 0.032 243.6)
-
Step 500
500
#758DA0
oklch(63.1% 0.04 242.2)
-
Step 600
600 (this color)
#556E82
oklch(52.6% 0.043 242.8)
-
Step 700
700
#4D6476
oklch(49.2% 0.04 242.2)
-
Step 800
800
#3F5160
oklch(42.6% 0.034 243.8)
-
Step 900
900
#36434E
oklch(37.6% 0.025 244)
-
Step 950
950
#20282E
oklch(27.2% 0.016 240.6)
#556E82 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) | #666E83 | 0.023 |
| Deuteranopia (no green cones) | #606982 | 0.020 |
| Tritanopia (no blue cones) | #477374 | 0.036 |
| Achromatopsia (no color) | #6B6B6B | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556E82
#556E82
oklch(52.6% 0.043 242.8)
- #7D6551
#7D6551
oklch(52.5% 0.043 61.5)
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 #556E82, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.021
- Slate #516572 ΔE 0.033
- Dull Blue #49759C ΔE 0.041
- Battleship Gray #6C757D ΔE 0.041
- Dim Gray #696969 ΔE 0.044
- Stormy Blue #507B9C ΔE 0.047
- Cerulean #457B9D ΔE 0.049
- Muted Blue #3B719F ΔE 0.050
Use #556E82 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.