#555C87
Closest named color: Dusky Blue (#475F94). oklch(48.7% 0.07 276.4), rgb(85, 92, 135).
Aa
White text reads best on this color (6.42:1).
About this color
#555C87 is a medium-dark, muted blue. In OKLCH its lightness is 49%, its chroma 0.070 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.026 away. White text reads best on it, at 6.42:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.26:1 |
| White text | 6.42:1 |
Values
| HEX | #555C87 |
| RGB | rgb(85, 92, 135) |
| HSL | hsl(232, 23%, 43%) |
| OKLCH | oklch(48.7% 0.07 276.4) |
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 #555C87 | 6.42:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #555C87 | 3.26:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #555C87 text on white | 6.42:1 | AA | Lc 81.9 | Fine for body text |
| #555C87 text on black | 3.26:1 | AA large text | Lc -20.0 | 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
#E8E9F0
oklch(93.5% 0.009 279.7)
-
Step 200
200
#D5D8E6
oklch(88.4% 0.019 276.3)
-
Step 300
300
#BABFD7
oklch(80.8% 0.034 276.3)
-
Step 400
400
#979EC3
oklch(70.7% 0.055 276.5)
-
Step 500
500
#7E86B3
oklch(63.1% 0.068 276.4)
-
Step 600
600
#676F9F
oklch(55.5% 0.075 276.4)
-
Step 700
700 (this color)
#555C87
oklch(48.7% 0.07 276.4)
-
Step 800
800
#464C6F
oklch(42.6% 0.059 276.2)
-
Step 900
900
#3B405A
oklch(37.8% 0.045 275.6)
-
Step 950
950
#232534
oklch(26.9% 0.028 278.4)
#555C87 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) | #4E6189 | 0.016 |
| Deuteranopia (no green cones) | #4B5D86 | 0.014 |
| Tritanopia (no blue cones) | #47646B | 0.062 |
| Achromatopsia (no color) | #5F5F5F | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555C87
#555C87
oklch(48.7% 0.07 276.4)
- #6B602F
#6B602F
oklch(48.8% 0.07 96.9)
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 #555C87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.026
- Dusk #4E5481 ΔE 0.027
- Dusty Grape #545775 ΔE 0.030
- Denim #3B638C ΔE 0.035
- Twilight #4E518B ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.049
Use #555C87 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.