#556191
Closest named color: Dusky Blue (#475F94). oklch(50.3% 0.078 272.6), rgb(85, 97, 145).
Aa
White text reads best on this color (5.99:1).
About this color
#556191 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.078 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.021 away. White text reads best on it, at 5.99:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.50:1 |
| White text | 5.99:1 |
Values
| HEX | #556191 |
| RGB | rgb(85, 97, 145) |
| HSL | hsl(228, 26%, 45%) |
| OKLCH | oklch(50.3% 0.078 272.6) |
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 #556191 | 5.99:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #556191 | 3.50:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #556191 text on white | 5.99:1 | AA | Lc 79.9 | Fine for body text |
| #556191 text on black | 3.50:1 | AA large text | Lc -21.9 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7EAF1
oklch(93.7% 0.01 267.4)
-
Step 200
200
#D4D9E7
oklch(88.6% 0.02 270.2)
-
Step 300
300
#B8C0DA
oklch(81% 0.038 272)
-
Step 400
400
#939FC7
oklch(70.7% 0.06 271.8)
-
Step 500
500
#7987B9
oklch(63.2% 0.077 272)
-
Step 600
600
#6370A5
oklch(55.7% 0.084 272.9)
-
Step 700
700 (this color)
#556191
oklch(50.3% 0.078 272.6)
-
Step 800
800
#434C73
oklch(42.6% 0.066 273.4)
-
Step 900
900
#38405D
oklch(37.7% 0.051 271.9)
-
Step 950
950
#212536
oklch(26.9% 0.032 273.8)
#556191 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) | #516693 | 0.014 |
| Deuteranopia (no green cones) | #4C6190 | 0.012 |
| Tritanopia (no blue cones) | #426B72 | 0.071 |
| Achromatopsia (no color) | #636363 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556191
#556191
oklch(50.3% 0.078 272.6)
- #74632B
#74632B
oklch(50.4% 0.078 92.5)
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 #556191, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.021
- Denim #3B638C ΔE 0.034
- Denim Blue #3B5B92 ΔE 0.040
- Dusk #4E5481 ΔE 0.043
- Twilight #4E518B ΔE 0.047
- Dusty Grape #545775 ΔE 0.048
- French Blue #436BAD ΔE 0.049
- Muted Blue #3B719F ΔE 0.050
Use #556191 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.