#555F97
Closest named color: Dusky Blue (#475F94). oklch(50.2% 0.09 275), rgb(85, 95, 151).
Aa
White text reads best on this color (6.05:1).
About this color
#555F97 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.090 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.020 away. White text reads best on it, at 6.05:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.47:1 |
| White text | 6.05:1 |
Values
| HEX | #555F97 |
| RGB | rgb(85, 95, 151) |
| HSL | hsl(231, 28%, 46%) |
| OKLCH | oklch(50.2% 0.09 275) |
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 #555F97 | 6.05:1 | AA | Lc -85.3 | Fine for body text |
| Black text on #555F97 | 3.47:1 | AA large text | Lc 23.9 | Dividers and decoration only |
| #555F97 text on white | 6.05:1 | AA | Lc 80.2 | Fine for body text |
| #555F97 text on black | 3.47:1 | AA large text | Lc -21.7 | 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
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D4D8EA
oklch(88.5% 0.025 275.9)
-
Step 300
300
#B8BFDD
oklch(80.9% 0.043 275)
-
Step 400
400
#939ECD
oklch(70.8% 0.07 274.3)
-
Step 500
500
#7A85BF
oklch(63.1% 0.088 275.3)
-
Step 600
600
#636EAC
oklch(55.6% 0.097 275.1)
-
Step 700
700 (this color)
#555F97
oklch(50.2% 0.09 275)
-
Step 800
800
#434B78
oklch(42.7% 0.075 275.1)
-
Step 900
900
#383F60
oklch(37.7% 0.057 274.2)
-
Step 950
950
#212538
oklch(27% 0.036 274.6)
#555F97 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) | #4B6599 | 0.020 |
| Deuteranopia (no green cones) | #466096 | 0.020 |
| Tritanopia (no blue cones) | #3F6A74 | 0.079 |
| Achromatopsia (no color) | #636363 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555F97
#555F97
oklch(50.2% 0.09 275)
- #74631C
#74631C
oklch(50.2% 0.09 95.2)
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 #555F97, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.020
- Denim Blue #3B5B92 ΔE 0.038
- Denim #3B638C ΔE 0.040
- Twilight #4E518B ΔE 0.043
- Dusk #4E5481 ΔE 0.045
- French Blue #436BAD ΔE 0.045
- Muted Blue #3B719F ΔE 0.054
- Dusty Grape #545775 ΔE 0.055
Use #555F97 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.