#555B80
Closest named color: Dusty Grape (#545775). oklch(48.1% 0.06 276.8), rgb(85, 91, 128).
Aa
White text reads best on this color (6.57:1).
About this color
#555B80 is a medium-dark, muted blue. In OKLCH its lightness is 48%, its chroma 0.060 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.019 away. White text reads best on it, at 6.57:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.19:1 |
| White text | 6.57:1 |
Values
| HEX | #555B80 |
| RGB | rgb(85, 91, 128) |
| HSL | hsl(232, 20%, 42%) |
| OKLCH | oklch(48.1% 0.06 276.8) |
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 #555B80 | 6.57:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #555B80 | 3.19:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #555B80 text on white | 6.57:1 | AA | Lc 82.5 | Fine for body text |
| #555B80 text on black | 3.19:1 | AA large text | Lc -19.4 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E8E9F0
oklch(93.5% 0.009 279.7)
-
Step 200
200
#D6D8E4
oklch(88.4% 0.017 278.5)
-
Step 300
300
#BBBFD4
oklch(80.8% 0.03 277.1)
-
Step 400
400
#999FBE
oklch(70.8% 0.046 276.6)
-
Step 500
500
#8087AE
oklch(63.2% 0.059 276.6)
-
Step 600
600
#697099
oklch(55.5% 0.064 276.6)
-
Step 700
700 (this color)
#555B80
oklch(48.1% 0.06 276.8)
-
Step 800
800
#484D6A
oklch(42.8% 0.049 276.6)
-
Step 900
900
#3C4056
oklch(37.7% 0.038 276.4)
-
Step 950
950
#232533
oklch(26.9% 0.026 278.2)
#555B80 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) | #505F82 | 0.013 |
| Deuteranopia (no green cones) | #4D5C7F | 0.012 |
| Tritanopia (no blue cones) | #496268 | 0.054 |
| Achromatopsia (no color) | #5D5D5D | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555B80
#555B80
oklch(48.1% 0.06 276.8)
- #685E35
#685E35
oklch(48.1% 0.06 96.1)
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 #555B80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.019
- Dusk #4E5481 ΔE 0.025
- YInMn Blue #415A77 ΔE 0.033
- Dusky Blue #475F94 ΔE 0.035
- Denim #3B638C ΔE 0.038
- Twilight #4E518B ΔE 0.040
- Slate #516572 ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.044
Use #555B80 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.