#555B79
Closest named color: Dusty Grape (#545775). oklch(47.8% 0.049 275.6), rgb(85, 91, 121).
Aa
White text reads best on this color (6.64:1).
About this color
#555B79 is a medium-dark, muted blue. In OKLCH its lightness is 48%, its chroma 0.049 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.012 away. White text reads best on it, at 6.64:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.15:1 |
| White text | 6.64:1 |
Values
| HEX | #555B79 |
| RGB | rgb(85, 91, 121) |
| HSL | hsl(230, 17%, 40%) |
| OKLCH | oklch(47.8% 0.049 275.6) |
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 #555B79 | 6.64:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #555B79 | 3.15:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #555B79 text on white | 6.64:1 | AA | Lc 82.8 | Fine for body text |
| #555B79 text on black | 3.15:1 | AA large text | Lc -19.1 | 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
#E8E9EE
oklch(93.5% 0.007 277.2)
-
Step 200
200
#D6D9E2
oklch(88.6% 0.013 271.3)
-
Step 300
300
#BCC0D0
oklch(81% 0.023 274.7)
-
Step 400
400
#9A9FB9
oklch(70.7% 0.038 276.8)
-
Step 500
500
#8188A7
oklch(63.2% 0.047 275)
-
Step 600
600
#6A7193
oklch(55.6% 0.054 275.5)
-
Step 700
700 (this color)
#555B79
oklch(47.8% 0.049 275.6)
-
Step 800
800
#484D66
oklch(42.6% 0.042 275.7)
-
Step 900
900
#3D4053
oklch(37.7% 0.033 277.7)
-
Step 950
950
#242630
oklch(27.1% 0.019 276.2)
#555B79 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) | #525E7A | 0.009 |
| Deuteranopia (no green cones) | #505B78 | 0.008 |
| Tritanopia (no blue cones) | #4C6165 | 0.045 |
| Achromatopsia (no color) | #5C5C5C | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555B79
#555B79
oklch(47.8% 0.049 275.6)
- #655D3D
#655D3D
oklch(47.7% 0.049 95.8)
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 #555B79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.012
- YInMn Blue #415A77 ΔE 0.029
- Dusk #4E5481 ΔE 0.030
- Slate #516572 ΔE 0.036
- Denim #3B638C ΔE 0.043
- Dusky Blue #475F94 ΔE 0.045
- Twilight #4E518B ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.052
Use #555B79 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.