#55609E
Closest named color: Dusky Blue (#475F94). oklch(50.8% 0.099 274.7), rgb(85, 96, 158).
Aa
White text reads best on this color (5.91:1).
About this color
#55609E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.099 and its hue 275°. 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 5.91:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.55:1 |
| White text | 5.91:1 |
Values
| HEX | #55609E |
| RGB | rgb(85, 96, 158) |
| HSL | hsl(231, 30%, 48%) |
| OKLCH | oklch(50.8% 0.099 274.7) |
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 #55609E | 5.91:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #55609E | 3.55:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #55609E text on white | 5.91:1 | AA | Lc 79.5 | Fine for body text |
| #55609E text on black | 3.55:1 | AA large text | Lc -22.4 | 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
#D3D8EB
oklch(88.4% 0.027 274.1)
-
Step 300
300
#B7BFE0
oklch(80.9% 0.047 274.6)
-
Step 400
400
#929DD1
oklch(70.6% 0.077 275)
-
Step 500
500
#7884C5
oklch(63% 0.099 275.2)
-
Step 600
600
#616DB1
oklch(55.5% 0.106 274.8)
-
Step 700
700 (this color)
#55609E
oklch(50.8% 0.099 274.7)
-
Step 800
800
#424B7C
oklch(42.8% 0.082 274.5)
-
Step 900
900
#373F63
oklch(37.7% 0.063 273.5)
-
Step 950
950
#20253A
oklch(27% 0.04 273.2)
#55609E 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) | #4967A0 | 0.023 |
| Deuteranopia (no green cones) | #43619D | 0.023 |
| Tritanopia (no blue cones) | #3B6D77 | 0.089 |
| Achromatopsia (no color) | #646464 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55609E
#55609E
oklch(50.8% 0.099 274.7)
- #78640F
#78640F
oklch(50.8% 0.099 94.3)
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 #55609E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.026
- French Blue #436BAD ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.043
- Denim #3B638C ΔE 0.046
- Twilight #4E518B ΔE 0.050
- Muted Blue #3B719F ΔE 0.053
- Dusk #4E5481 ΔE 0.054
- Flat Blue #3C73A8 ΔE 0.056
Use #55609E 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.