#555E79
Closest named color: Dusty Grape (#545775). oklch(48.5% 0.045 270.3), rgb(85, 94, 121).
Aa
White text reads best on this color (6.43:1).
About this color
#555E79 is a medium-dark, muted blue. In OKLCH its lightness is 48%, its chroma 0.045 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Grape (#545775), ΔE 0.021 away. White text reads best on it, at 6.43:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Dusty Grape (#545775) |
| Black text | 3.26:1 |
| White text | 6.43:1 |
Values
| HEX | #555E79 |
| RGB | rgb(85, 94, 121) |
| HSL | hsl(225, 17%, 40%) |
| OKLCH | oklch(48.5% 0.045 270.3) |
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 #555E79 | 6.43:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #555E79 | 3.26:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #555E79 text on white | 6.43:1 | AA | Lc 82.0 | Fine for body text |
| #555E79 text on black | 3.26:1 | AA large text | Lc -19.9 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D6D9E1
oklch(88.5% 0.011 269.5)
-
Step 300
300
#BBC0CF
oklch(80.8% 0.022 271.1)
-
Step 400
400
#98A0B7
oklch(70.7% 0.035 270.3)
-
Step 500
500
#7F89A5
oklch(63.2% 0.044 269.7)
-
Step 600
600
#687290
oklch(55.5% 0.048 270.4)
-
Step 700
700 (this color)
#555E79
oklch(48.5% 0.045 270.3)
-
Step 800
800
#474E64
oklch(42.7% 0.038 271)
-
Step 900
900
#3B4151
oklch(37.6% 0.029 268.9)
-
Step 950
950
#232630
oklch(27% 0.019 272)
#555E79 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) | #56607A | 0.006 |
| Deuteranopia (no green cones) | #535D78 | 0.005 |
| Tritanopia (no blue cones) | #4B6367 | 0.040 |
| Achromatopsia (no color) | #5E5E5E | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555E79
#555E79
oklch(48.5% 0.045 270.3)
- #695E41
#695E41
oklch(48.5% 0.045 89.6)
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 #555E79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Grape #545775 ΔE 0.021
- Slate #516572 ΔE 0.028
- YInMn Blue #415A77 ΔE 0.031
- Dusk #4E5481 ΔE 0.038
- Denim #3B638C ΔE 0.041
- Dusky Blue #475F94 ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.055
- Twilight #4E518B ΔE 0.056
Use #555E79 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.