#556F8A
Closest named color: Metallic Blue (#4F738E). oklch(53.2% 0.053 249.8), rgb(85, 111, 138).
Aa
White text reads best on this color (5.21:1).
About this color
#556F8A is a medium-dark, muted blue. In OKLCH its lightness is 53%, its chroma 0.053 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.013 away. White text reads best on it, at 5.21:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.02:1 |
| White text | 5.21:1 |
Values
| HEX | #556F8A |
| RGB | rgb(85, 111, 138) |
| HSL | hsl(211, 24%, 44%) |
| OKLCH | oklch(53.2% 0.053 249.8) |
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 #556F8A | 5.21:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #556F8A | 4.02:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #556F8A text on white | 5.21:1 | AA | Lc 75.8 | Fine for body text |
| #556F8A text on black | 4.02:1 | AA large text | Lc -25.9 | 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
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D3DAE2
oklch(88.5% 0.013 251.6)
-
Step 300
300
#B5C2D0
oklch(80.8% 0.024 250.1)
-
Step 400
400
#8FA3B8
oklch(70.7% 0.038 249.7)
-
Step 500
500
#748CA6
oklch(63.1% 0.048 250.6)
-
Step 600
600 (this color)
#556F8A
oklch(53.2% 0.053 249.8)
-
Step 700
700
#4B637C
oklch(49.1% 0.05 249.9)
-
Step 800
800
#3E5165
oklch(42.7% 0.041 250.1)
-
Step 900
900
#354352
oklch(37.7% 0.032 250.4)
-
Step 950
950
#1F2730
oklch(26.9% 0.02 251.6)
#556F8A 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) | #65708B | 0.022 |
| Deuteranopia (no green cones) | #5E6A89 | 0.017 |
| Tritanopia (no blue cones) | #437578 | 0.045 |
| Achromatopsia (no color) | #6C6C6C | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556F8A
#556F8A
oklch(53.2% 0.053 249.8)
- #80674B
#80674B
oklch(53.1% 0.052 69.5)
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 #556F8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.013
- Dull Blue #49759C ΔE 0.030
- Stormy Blue #507B9C ΔE 0.038
- Cerulean #457B9D ΔE 0.040
- Muted Blue #3B719F ΔE 0.040
- Slate #516572 ΔE 0.043
- Battleship Gray #6C757D ΔE 0.044
- Grey Blue #647D8E ΔE 0.047
Use #556F8A 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.