#555E71
Closest named color: Slate (#516572). oklch(48.1% 0.033 265.2), rgb(85, 94, 113).
Aa
White text reads best on this color (6.51:1).
About this color
#555E71 is a medium-dark, muted blue. In OKLCH its lightness is 48%, its chroma 0.033 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.021 away. White text reads best on it, at 6.51:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.22:1 |
| White text | 6.51:1 |
Values
| HEX | #555E71 |
| RGB | rgb(85, 94, 113) |
| HSL | hsl(221, 14%, 39%) |
| OKLCH | oklch(48.1% 0.033 265.2) |
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 #555E71 | 6.51:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #555E71 | 3.22:1 | AA large text | Lc 21.8 | Dividers and decoration only |
| #555E71 text on white | 6.51:1 | AA | Lc 82.3 | Fine for body text |
| #555E71 text on black | 3.22:1 | AA large text | Lc -19.6 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E8EAED
oklch(93.6% 0.005 258.3)
-
Step 200
200
#D6D9DF
oklch(88.5% 0.009 264.5)
-
Step 300
300
#BCC1CB
oklch(81% 0.015 264.5)
-
Step 400
400
#99A1B1
oklch(70.8% 0.025 264.4)
-
Step 500
500
#808A9E
oklch(63.2% 0.032 264.3)
-
Step 600
600
#697389
oklch(55.5% 0.036 265.9)
-
Step 700
700 (this color)
#555E71
oklch(48.1% 0.033 265.2)
-
Step 800
800
#484F5E
oklch(42.7% 0.027 265.5)
-
Step 900
900
#3C424D
oklch(37.8% 0.02 262.6)
-
Step 950
950
#23262D
oklch(26.9% 0.014 267)
#555E71 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) | #585F72 | 0.006 |
| Deuteranopia (no green cones) | #565D71 | 0.003 |
| Tritanopia (no blue cones) | #4E6264 | 0.030 |
| Achromatopsia (no color) | #5E5E5E | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #555E71
#555E71
oklch(48.1% 0.033 265.2)
- #665D49
#665D49
oklch(48.1% 0.033 86.6)
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 #555E71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.021
- Dusty Grape #545775 ΔE 0.024
- YInMn Blue #415A77 ΔE 0.033
- Dusk #4E5481 ΔE 0.047
- Denim #3B638C ΔE 0.050
- Dim Gray #696969 ΔE 0.051
- Dusky Blue #475F94 ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.063
Use #555E71 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.