#55678E
Closest named color: Dusky Blue (#475F94). oklch(51.5% 0.066 265.1), rgb(85, 103, 142).
Aa
White text reads best on this color (5.64:1).
About this color
#55678E is a medium-dark, muted blue. In OKLCH its lightness is 52%, its chroma 0.066 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.035 away. White text reads best on it, at 5.64:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.71:1 |
| White text | 5.64:1 |
Values
| HEX | #55678E |
| RGB | rgb(85, 103, 142) |
| HSL | hsl(221, 25%, 45%) |
| OKLCH | oklch(51.5% 0.066 265.1) |
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 #55678E | 5.64:1 | AA | Lc -83.5 | Fine for body text |
| Black text on #55678E | 3.71:1 | AA large text | Lc 25.9 | Dividers and decoration only |
| #55678E text on white | 5.64:1 | AA | Lc 78.2 | Fine for body text |
| #55678E text on black | 3.71:1 | AA large text | Lc -23.6 | 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
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D3D9E5
oklch(88.4% 0.018 264.5)
-
Step 300
300
#B7C1D6
oklch(81% 0.032 265.3)
-
Step 400
400
#91A1C1
oklch(70.8% 0.05 264.2)
-
Step 500
500
#7689B2
oklch(63.1% 0.066 265.2)
-
Step 600
600
#5F739D
oklch(55.6% 0.07 264.6)
-
Step 700
700 (this color)
#55678E
oklch(51.5% 0.066 265.1)
-
Step 800
800
#404F6D
oklch(42.8% 0.054 263.8)
-
Step 900
900
#364159
oklch(37.6% 0.044 265.3)
-
Step 950
950
#202634
oklch(26.9% 0.028 266.5)
#55678E 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) | #5A6A90 | 0.012 |
| Deuteranopia (no green cones) | #54658D | 0.006 |
| Tritanopia (no blue cones) | #426F75 | 0.059 |
| Achromatopsia (no color) | #676767 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55678E
#55678E
oklch(51.5% 0.066 265.1)
- #796539
#796539
oklch(51.6% 0.067 85.7)
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 #55678E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.035
- Denim #3B638C ΔE 0.035
- Metallic Blue #4F738E ΔE 0.036
- Muted Blue #3B719F ΔE 0.041
- Dull Blue #49759C ΔE 0.041
- Slate #516572 ΔE 0.045
- Flat Blue #3C73A8 ΔE 0.050
- French Blue #436BAD ΔE 0.051
Use #55678E 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.