#555FA0
Closest named color: Dusky Blue (#475F94). oklch(50.7% 0.104 275.5), rgb(85, 95, 160).
Aa
White text reads best on this color (5.94:1).
About this color
#555FA0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.104 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.028 away. White text reads best on it, at 5.94:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #555FA0 |
| RGB | rgb(85, 95, 160) |
| HSL | hsl(232, 31%, 48%) |
| OKLCH | oklch(50.7% 0.104 275.5) |
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 #555FA0 | 5.94:1 | AA | Lc -84.8 | Fine for body text |
| Black text on #555FA0 | 3.53:1 | AA large text | Lc 24.4 | Dividers and decoration only |
| #555FA0 text on white | 5.94:1 | AA | Lc 79.6 | Fine for body text |
| #555FA0 text on black | 3.53:1 | AA large text | Lc -22.2 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F4
oklch(93.6% 0.015 277.8)
-
Step 200
200
#D3D8EC
oklch(88.4% 0.028 274.6)
-
Step 300
300
#B7BFE2
oklch(81% 0.05 275.1)
-
Step 400
400
#929DD3
oklch(70.7% 0.08 275.3)
-
Step 500
500
#7884C7
oklch(63.1% 0.102 275.4)
-
Step 600
600
#616CB4
oklch(55.5% 0.112 275.5)
-
Step 700
700 (this color)
#555FA0
oklch(50.7% 0.104 275.5)
-
Step 800
800
#424A7E
oklch(42.7% 0.087 275.5)
-
Step 900
900
#383E65
oklch(37.7% 0.067 276)
-
Step 950
950
#21253B
oklch(27.2% 0.041 275.4)
#555FA0 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) | #4767A3 | 0.026 |
| Deuteranopia (no green cones) | #40619F | 0.027 |
| Tritanopia (no blue cones) | #3A6C78 | 0.090 |
| Achromatopsia (no color) | #646464 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555FA0
#555FA0
oklch(50.7% 0.104 275.5)
- #786402
#786402
oklch(50.8% 0.104 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 #555FA0, closest first.
No curated palette has a color within ΔE 0.04 of #555FA0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.028
- French Blue #436BAD ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.043
- Twilight #4E518B ΔE 0.049
- Denim #3B638C ΔE 0.050
- Mid Blue #276AB3 ΔE 0.055
- Dusk #4E5481 ΔE 0.056
- Muted Blue #3B719F ΔE 0.056
Use #555FA0 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.