#556783
Closest named color: Slate (#516572). oklch(51% 0.05 259.1), rgb(85, 103, 131).
Aa
White text reads best on this color (5.74:1).
About this color
#556783 is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.050 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.028 away. White text reads best on it, at 5.74:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.65:1 |
| White text | 5.74:1 |
Values
| HEX | #556783 |
| RGB | rgb(85, 103, 131) |
| HSL | hsl(217, 21%, 42%) |
| OKLCH | oklch(51% 0.05 259.1) |
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 #556783 | 5.74:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #556783 | 3.65:1 | AA large text | Lc 25.3 | Dividers and decoration only |
| #556783 text on white | 5.74:1 | AA | Lc 78.7 | Fine for body text |
| #556783 text on black | 3.65:1 | AA large text | Lc -23.1 | 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
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D4D9E2
oklch(88.4% 0.013 262.4)
-
Step 300
300
#B7C1D1
oklch(80.8% 0.025 259.8)
-
Step 400
400
#92A2B9
oklch(70.7% 0.038 257.4)
-
Step 500
500
#788BA8
oklch(63.2% 0.049 258.7)
-
Step 600
600
#617493
oklch(55.6% 0.054 260.1)
-
Step 700
700 (this color)
#556783
oklch(51% 0.05 259.1)
-
Step 800
800
#415066
oklch(42.8% 0.041 257.9)
-
Step 900
900
#374253
oklch(37.6% 0.033 259)
-
Step 950
950
#202731
oklch(27% 0.021 257.3)
#556783 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) | #5D6884 | 0.012 |
| Deuteranopia (no green cones) | #586482 | 0.009 |
| Tritanopia (no blue cones) | #476D70 | 0.045 |
| Achromatopsia (no color) | #666666 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556783
#556783
oklch(51% 0.05 259.1)
- #766345
#766345
oklch(51% 0.05 78.7)
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 #556783, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.028
- Metallic Blue #4F738E ΔE 0.035
- Denim #3B638C ΔE 0.038
- Dusky Blue #475F94 ΔE 0.045
- Dusty Grape #545775 ΔE 0.047
- Dull Blue #49759C ΔE 0.049
- Muted Blue #3B719F ΔE 0.051
- Dim Gray #696969 ΔE 0.051
Use #556783 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.