#555B82
Closest named color: Dusty Grape (#545775). oklch(48.2% 0.063 277), rgb(85, 91, 130).
Aa
White text reads best on this color (6.55:1).
About this color
#555B82 is a medium-dark, muted blue. In OKLCH its lightness is 48%, its chroma 0.063 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.022 away. White text reads best on it, at 6.55:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.20:1 |
| White text | 6.55:1 |
Values
| HEX | #555B82 |
| RGB | rgb(85, 91, 130) |
| HSL | hsl(232, 21%, 42%) |
| OKLCH | oklch(48.2% 0.063 277) |
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 #555B82 | 6.55:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #555B82 | 3.20:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #555B82 text on white | 6.55:1 | AA | Lc 82.4 | Fine for body text |
| #555B82 text on black | 3.20:1 | AA large text | Lc -19.5 | 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
#D6D8E5
oklch(88.5% 0.018 279)
-
Step 300
300
#BBBFD5
oklch(80.8% 0.031 277.5)
-
Step 400
400
#989EC0
oklch(70.6% 0.05 277.2)
-
Step 500
500
#7F86B0
oklch(63% 0.064 277.1)
-
Step 600
600
#69709B
oklch(55.6% 0.067 276.8)
-
Step 700
700 (this color)
#555B82
oklch(48.2% 0.063 277)
-
Step 800
800
#474C6C
oklch(42.6% 0.054 277)
-
Step 900
900
#3C4057
oklch(37.8% 0.04 276.7)
-
Step 950
950
#232533
oklch(26.9% 0.026 278.2)
#555B82 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) | #4F5F84 | 0.013 |
| Deuteranopia (no green cones) | #4C5C81 | 0.013 |
| Tritanopia (no blue cones) | #496269 | 0.055 |
| Achromatopsia (no color) | #5D5D5D | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555B82
#555B82
oklch(48.2% 0.063 277)
- #685E33
#685E33
oklch(48.1% 0.063 96.6)
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 #555B82, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.022
- Dusk #4E5481 ΔE 0.024
- Dusky Blue #475F94 ΔE 0.033
- YInMn Blue #415A77 ΔE 0.034
- Denim #3B638C ΔE 0.038
- Twilight #4E518B ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.042
- Slate #516572 ΔE 0.046
Use #555B82 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.