#555E87
Closest named color: Dusky Blue (#475F94). oklch(49.2% 0.067 274.2), rgb(85, 94, 135).
Aa
White text reads best on this color (6.29:1).
About this color
#555E87 is a medium-dark, muted blue. In OKLCH its lightness is 49%, its chroma 0.067 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.027 away. White text reads best on it, at 6.29:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.33:1 |
| White text | 6.29:1 |
Values
| HEX | #555E87 |
| RGB | rgb(85, 94, 135) |
| HSL | hsl(229, 23%, 43%) |
| OKLCH | oklch(49.2% 0.067 274.2) |
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 #555E87 | 6.29:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #555E87 | 3.33:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #555E87 text on white | 6.29:1 | AA | Lc 81.3 | Fine for body text |
| #555E87 text on black | 3.33:1 | AA large text | Lc -20.6 | 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
#D5D9E5
oklch(88.6% 0.017 271.2)
-
Step 300
300
#BAC0D6
oklch(81% 0.032 273.6)
-
Step 400
400
#969FC2
oklch(70.7% 0.052 273.7)
-
Step 500
500
#7D87B2
oklch(63.1% 0.066 274.2)
-
Step 600
600
#66709E
oklch(55.5% 0.073 274.4)
-
Step 700
700 (this color)
#555E87
oklch(49.2% 0.067 274.2)
-
Step 800
800
#454D6E
oklch(42.7% 0.056 273.4)
-
Step 900
900
#3A4059
oklch(37.7% 0.044 273.7)
-
Step 950
950
#222634
oklch(27.1% 0.027 272.1)
#555E87 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) | #516289 | 0.012 |
| Deuteranopia (no green cones) | #4D5E86 | 0.011 |
| Tritanopia (no blue cones) | #47666D | 0.059 |
| Achromatopsia (no color) | #606060 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555E87
#555E87
oklch(49.2% 0.067 274.2)
- #6D6032
#6D6032
oklch(49.1% 0.067 94)
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 #555E87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.027
- Dusty Grape #545775 ΔE 0.032
- Dusk #4E5481 ΔE 0.032
- Denim #3B638C ΔE 0.033
- Denim Blue #3B5B92 ΔE 0.040
- YInMn Blue #415A77 ΔE 0.040
- Twilight #4E518B ΔE 0.042
- Slate #516572 ΔE 0.046
Use #555E87 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.