#556383
Closest named color: Slate (#516572). oklch(50.1% 0.054 266.2), rgb(85, 99, 131).
Aa
White text reads best on this color (6.00:1).
About this color
#556383 is a medium-dark, muted blue. In OKLCH its lightness is 50%, its chroma 0.054 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.031 away. White text reads best on it, at 6.00:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.49:1 |
| White text | 6.00:1 |
Values
| HEX | #556383 |
| RGB | rgb(85, 99, 131) |
| HSL | hsl(222, 21%, 42%) |
| OKLCH | oklch(50.1% 0.054 266.2) |
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 #556383 | 6.00:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #556383 | 3.49:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #556383 text on white | 6.00:1 | AA | Lc 80.0 | Fine for body text |
| #556383 text on black | 3.49:1 | AA large text | Lc -21.8 | 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
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D5D9E3
oklch(88.5% 0.014 268.5)
-
Step 300
300
#B9C1D2
oklch(81% 0.026 265.6)
-
Step 400
400
#94A1BC
oklch(70.8% 0.042 265)
-
Step 500
500
#7A89AB
oklch(63.1% 0.054 266.2)
-
Step 600
600
#637396
oklch(55.6% 0.058 265.5)
-
Step 700
700 (this color)
#556383
oklch(50.1% 0.054 266.2)
-
Step 800
800
#434F68
oklch(42.8% 0.044 264.6)
-
Step 900
900
#394155
oklch(37.6% 0.036 267.7)
-
Step 950
950
#212632
oklch(26.9% 0.024 267.1)
#556383 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) | #586584 | 0.008 |
| Deuteranopia (no green cones) | #546182 | 0.006 |
| Tritanopia (no blue cones) | #47696E | 0.048 |
| Achromatopsia (no color) | #636363 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556383
#556383
oklch(50.1% 0.054 266.2)
- #71623F
#71623F
oklch(50.2% 0.054 87.2)
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 #556383, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.031
- Denim #3B638C ΔE 0.034
- Dusty Grape #545775 ΔE 0.037
- Dusky Blue #475F94 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.043
- Metallic Blue #4F738E ΔE 0.046
- Dusk #4E5481 ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.052
Use #556383 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.