#555C8B
Closest named color: Dusky Blue (#475F94). oklch(48.9% 0.076 276.7), rgb(85, 92, 139).
Aa
White text reads best on this color (6.38:1).
About this color
#555C8B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.076 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.023 away. White text reads best on it, at 6.38:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.28:1 |
| White text | 6.38:1 |
Values
| HEX | #555C8B |
| RGB | rgb(85, 92, 139) |
| HSL | hsl(232, 24%, 44%) |
| OKLCH | oklch(48.9% 0.076 276.7) |
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 #555C8B | 6.38:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #555C8B | 3.28:1 | AA large text | Lc 22.4 | Dividers and decoration only |
| #555C8B text on white | 6.38:1 | AA | Lc 81.7 | Fine for body text |
| #555C8B text on black | 3.28:1 | AA large text | Lc -20.2 | 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
#E8E9F1
oklch(93.6% 0.011 280.5)
-
Step 200
200
#D5D8E7
oklch(88.4% 0.021 276.9)
-
Step 300
300
#BABFD9
oklch(80.9% 0.037 276.9)
-
Step 400
400
#979EC6
oklch(70.8% 0.059 277)
-
Step 500
500
#7D86B7
oklch(63.2% 0.075 276)
-
Step 600
600
#676FA3
oklch(55.7% 0.081 276.7)
-
Step 700
700 (this color)
#555C8B
oklch(48.9% 0.076 276.7)
-
Step 800
800
#464C71
oklch(42.8% 0.062 276.4)
-
Step 900
900
#3B3F5C
oklch(37.7% 0.05 277.7)
-
Step 950
950
#222536
oklch(27% 0.032 276.3)
#555C8B 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) | #4D618D | 0.017 |
| Deuteranopia (no green cones) | #495D8A | 0.017 |
| Tritanopia (no blue cones) | #45656D | 0.067 |
| Achromatopsia (no color) | #5F5F5F | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555C8B
#555C8B
oklch(48.9% 0.076 276.7)
- #6C6029
#6C6029
oklch(48.8% 0.076 97.1)
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 #555C8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.023
- Dusk #4E5481 ΔE 0.029
- Twilight #4E518B ΔE 0.035
- Dusty Grape #545775 ΔE 0.036
- Denim Blue #3B5B92 ΔE 0.036
- Denim #3B638C ΔE 0.036
- YInMn Blue #415A77 ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.050
Use #555C8B 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.