#55718E
Closest named color: Metallic Blue (#4F738E). oklch(53.8% 0.056 249.8), rgb(85, 113, 142).
Aa
White text reads best on this color (5.07:1).
About this color
#55718E is a medium-dark, muted blue. In OKLCH its lightness is 54%, its chroma 0.056 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.009 away. White text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.13:1 |
| White text | 5.07:1 |
Values
| HEX | #55718E |
| RGB | rgb(85, 113, 142) |
| HSL | hsl(211, 25%, 45%) |
| OKLCH | oklch(53.8% 0.056 249.8) |
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 #55718E | 5.07:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #55718E | 4.13:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #55718E text on white | 5.07:1 | AA | Lc 75.0 | Content text, not long reading |
| #55718E text on black | 4.13:1 | AA large text | Lc -26.7 | 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 600.
-
Step 50
50
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B5C2D1
oklch(80.9% 0.026 251.9)
-
Step 400
400
#8EA3B9
oklch(70.7% 0.04 249.6)
-
Step 500
500
#728CA8
oklch(63% 0.052 250.5)
-
Step 600
600 (this color)
#55718E
oklch(53.8% 0.056 249.8)
-
Step 700
700
#4A637E
oklch(49.1% 0.053 250.8)
-
Step 800
800
#3D5166
oklch(42.7% 0.043 250.1)
-
Step 900
900
#344353
oklch(37.7% 0.034 250.4)
-
Step 950
950
#1F2731
oklch(27% 0.022 254.2)
#55718E 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) | #66728F | 0.023 |
| Deuteranopia (no green cones) | #5F6C8D | 0.018 |
| Tritanopia (no blue cones) | #41787B | 0.048 |
| Achromatopsia (no color) | #6E6E6E | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #55718E
#55718E
oklch(53.8% 0.056 249.8)
- #84694A
#84694A
oklch(54% 0.057 70)
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 #55718E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.009
- Dull Blue #49759C ΔE 0.024
- Stormy Blue #507B9C ΔE 0.031
- Cerulean #457B9D ΔE 0.034
- Muted Blue #3B719F ΔE 0.037
- Grey Blue #647D8E ΔE 0.043
- Battleship Gray #6C757D ΔE 0.044
- Flat Blue #3C73A8 ΔE 0.046
Use #55718E 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.