#556A90
Closest named color: Metallic Blue (#4F738E). oklch(52.3% 0.066 262), rgb(85, 106, 144).
Aa
White text reads best on this color (5.45:1).
About this color
#556A90 is a medium-dark, muted blue. In OKLCH its lightness is 52%, its chroma 0.066 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.028 away. White text reads best on it, at 5.45:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 3.85:1 |
| White text | 5.45:1 |
Values
| HEX | #556A90 |
| RGB | rgb(85, 106, 144) |
| HSL | hsl(219, 26%, 45%) |
| OKLCH | oklch(52.3% 0.066 262) |
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 #556A90 | 5.45:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #556A90 | 3.85:1 | AA large text | Lc 26.9 | Dividers and decoration only |
| #556A90 text on white | 5.45:1 | AA | Lc 77.2 | Fine for body text |
| #556A90 text on black | 3.85:1 | AA large text | Lc -24.6 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D3D9E5
oklch(88.4% 0.018 264.5)
-
Step 300
300
#B6C1D6
oklch(80.9% 0.032 263.5)
-
Step 400
400
#8FA1C1
oklch(70.6% 0.051 261.9)
-
Step 500
500
#748AB1
oklch(63.1% 0.064 261.7)
-
Step 600
600
#5D749D
oklch(55.7% 0.07 261.7)
-
Step 700
700 (this color)
#556A90
oklch(52.3% 0.066 262)
-
Step 800
800
#3F4F6D
oklch(42.7% 0.054 262.6)
-
Step 900
900
#354258
oklch(37.7% 0.042 260.8)
-
Step 950
950
#1F2734
oklch(27.1% 0.027 260)
#556A90 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) | #5D6C92 | 0.013 |
| Deuteranopia (no green cones) | #56678F | 0.008 |
| Tritanopia (no blue cones) | #417277 | 0.059 |
| Achromatopsia (no color) | #696969 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556A90
#556A90
oklch(52.3% 0.066 262)
- #7D663C
#7D663C
oklch(52.3% 0.066 81.6)
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 #556A90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.028
- Dull Blue #49759C ΔE 0.033
- Muted Blue #3B719F ΔE 0.036
- Denim #3B638C ΔE 0.040
- Dusky Blue #475F94 ΔE 0.041
- Flat Blue #3C73A8 ΔE 0.045
- Slate #516572 ΔE 0.048
- Stormy Blue #507B9C ΔE 0.048
Use #556A90 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.