#556583
Closest named color: Slate (#516572). oklch(50.5% 0.052 262.8), rgb(85, 101, 131).
Aa
White text reads best on this color (5.87:1).
About this color
#556583 is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.052 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.029 away. White text reads best on it, at 5.87:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.57:1 |
| White text | 5.87:1 |
Values
| HEX | #556583 |
| RGB | rgb(85, 101, 131) |
| HSL | hsl(219, 21%, 42%) |
| OKLCH | oklch(50.5% 0.052 262.8) |
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 #556583 | 5.87:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #556583 | 3.57:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #556583 text on white | 5.87:1 | AA | Lc 79.4 | Fine for body text |
| #556583 text on black | 3.57:1 | AA large text | Lc -22.4 | 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
#D4D9E3
oklch(88.4% 0.015 264.5)
-
Step 300
300
#B8C1D1
oklch(80.9% 0.025 262.1)
-
Step 400
400
#93A1BA
oklch(70.6% 0.04 262.1)
-
Step 500
500
#798AA9
oklch(63.1% 0.051 262.4)
-
Step 600
600
#627495
oklch(55.7% 0.056 262.4)
-
Step 700
700 (this color)
#556583
oklch(50.5% 0.052 262.8)
-
Step 800
800
#424F67
oklch(42.6% 0.043 262.5)
-
Step 900
900
#384254
oklch(37.8% 0.034 262.1)
-
Step 950
950
#212731
oklch(27.1% 0.021 260.6)
#556583 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) | #5B6784 | 0.011 |
| Deuteranopia (no green cones) | #566382 | 0.006 |
| Tritanopia (no blue cones) | #476B6F | 0.046 |
| Achromatopsia (no color) | #646464 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556583
#556583
oklch(50.5% 0.052 262.8)
- #736242
#736242
oklch(50.4% 0.052 82.8)
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 #556583, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.029
- Denim #3B638C ΔE 0.036
- Metallic Blue #4F738E ΔE 0.040
- Dusky Blue #475F94 ΔE 0.041
- Dusty Grape #545775 ΔE 0.042
- YInMn Blue #415A77 ΔE 0.047
- Dusk #4E5481 ΔE 0.052
- Dull Blue #49759C ΔE 0.052
Use #556583 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.