#555B97
Closest named color: Dusky Blue (#475F94). oklch(49.4% 0.096 277.9), rgb(85, 91, 151).
Aa
White text reads best on this color (6.30:1).
About this color
#555B97 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.096 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.022 away. White text reads best on it, at 6.30:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.32:1 |
| White text | 6.30:1 |
Values
| HEX | #555B97 |
| RGB | rgb(85, 91, 151) |
| HSL | hsl(235, 28%, 46%) |
| OKLCH | oklch(49.4% 0.096 277.9) |
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 #555B97 | 6.30:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #555B97 | 3.32:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #555B97 text on white | 6.30:1 | AA | Lc 81.3 | Fine for body text |
| #555B97 text on black | 3.32:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D5D8EB
oklch(88.6% 0.026 278.7)
-
Step 300
300
#B9BEDF
oklch(80.8% 0.047 278.5)
-
Step 400
400
#959DCF
oklch(70.8% 0.074 277.3)
-
Step 500
500
#7C84C2
oklch(63.2% 0.094 277.7)
-
Step 600
600
#656CAF
oklch(55.5% 0.104 277.9)
-
Step 700
700 (this color)
#555B97
oklch(49.4% 0.096 277.9)
-
Step 800
800
#454A7A
oklch(42.7% 0.079 277.9)
-
Step 900
900
#3A3E62
oklch(37.7% 0.062 278.2)
-
Step 950
950
#222439
oklch(26.9% 0.039 279.2)
#555B97 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) | #466299 | 0.026 |
| Deuteranopia (no green cones) | #415D96 | 0.027 |
| Tritanopia (no blue cones) | #406772 | 0.083 |
| Achromatopsia (no color) | #606060 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555B97
#555B97
oklch(49.4% 0.096 277.9)
- #706110
#706110
oklch(49.3% 0.096 97.8)
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 #555B97, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.022
- Twilight #4E518B ΔE 0.034
- Denim Blue #3B5B92 ΔE 0.035
- Dusk #4E5481 ΔE 0.040
- Denim #3B638C ΔE 0.045
- French Blue #436BAD ΔE 0.052
- Dusty Grape #545775 ΔE 0.054
- Light Navy Blue #2E5A88 ΔE 0.056
Use #555B97 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.