#556388
Closest named color: Dusky Blue (#475F94). oklch(50.3% 0.062 268.2), rgb(85, 99, 136).
Aa
White text reads best on this color (5.95:1).
About this color
#556388 is a medium-dark, muted blue. In OKLCH its lightness is 50%, its chroma 0.062 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.031 away. White text reads best on it, at 5.95:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.52:1 |
| White text | 5.95:1 |
Values
| HEX | #556388 |
| RGB | rgb(85, 99, 136) |
| HSL | hsl(224, 23%, 43%) |
| OKLCH | oklch(50.3% 0.062 268.2) |
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 #556388 | 5.95:1 | AA | Lc -85.0 | Fine for body text |
| Black text on #556388 | 3.52:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #556388 text on white | 5.95:1 | AA | Lc 79.7 | Fine for body text |
| #556388 text on black | 3.52:1 | AA large text | Lc -22.1 | 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
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D4D9E4
oklch(88.5% 0.016 266.3)
-
Step 300
300
#B8C0D5
oklch(80.8% 0.031 269.1)
-
Step 400
400
#94A0BF
oklch(70.7% 0.047 268.5)
-
Step 500
500
#7A89AF
oklch(63.2% 0.06 267.9)
-
Step 600
600
#63729B
oklch(55.6% 0.067 268.7)
-
Step 700
700 (this color)
#556388
oklch(50.3% 0.062 268.2)
-
Step 800
800
#434E6B
oklch(42.7% 0.05 268.2)
-
Step 900
900
#384157
oklch(37.7% 0.04 267.2)
-
Step 950
950
#212633
oklch(27% 0.025 268.3)
#556388 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) | #57668A | 0.009 |
| Deuteranopia (no green cones) | #526287 | 0.006 |
| Tritanopia (no blue cones) | #466A70 | 0.054 |
| Achromatopsia (no color) | #646464 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556388
#556388
oklch(50.3% 0.062 268.2)
- #736239
#736239
oklch(50.3% 0.062 87.6)
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 #556388, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.031
- Denim #3B638C ΔE 0.032
- Slate #516572 ΔE 0.039
- Dusty Grape #545775 ΔE 0.041
- Metallic Blue #4F738E ΔE 0.046
- Dusk #4E5481 ΔE 0.046
- YInMn Blue #415A77 ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.047
Use #556388 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.