#57728B
Closest named color: Metallic Blue (#4F738E). oklch(54.1% 0.05 246.8), rgb(87, 114, 139).
Aa
White text reads best on this color (5.01:1).
About this color
#57728B is a medium-dark, muted blue. In OKLCH its lightness is 54%, its chroma 0.050 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.010 away. White text reads best on it, at 5.01:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.18:1 |
| White text | 5.01:1 |
Values
| HEX | #57728B |
| RGB | rgb(87, 114, 139) |
| HSL | hsl(209, 23%, 44%) |
| OKLCH | oklch(54.1% 0.05 246.8) |
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 #57728B | 5.01:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #57728B | 4.18:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #57728B text on white | 5.01:1 | AA | Lc 74.7 | Content text, not long reading |
| #57728B text on black | 4.18:1 | AA large text | Lc -27.1 | 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 600.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D3DAE1
oklch(88.5% 0.012 248)
-
Step 300
300
#B5C2CF
oklch(80.8% 0.023 248.1)
-
Step 400
400
#8FA3B6
oklch(70.6% 0.036 247)
-
Step 500
500
#738DA5
oklch(63.2% 0.047 246.5)
-
Step 600
600 (this color)
#57728B
oklch(54.1% 0.05 246.8)
-
Step 700
700
#4B647A
oklch(49.2% 0.046 245.5)
-
Step 800
800
#3E5163
oklch(42.6% 0.038 247.4)
-
Step 900
900
#354351
oklch(37.6% 0.03 248.6)
-
Step 950
950
#1F272F
oklch(26.9% 0.019 248.5)
#57728B 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) | #68728C | 0.023 |
| Deuteranopia (no green cones) | #626D8B | 0.020 |
| Tritanopia (no blue cones) | #46787A | 0.043 |
| Achromatopsia (no color) | #6F6F6F | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57728B
#57728B
oklch(54.1% 0.05 246.8)
- #83694F
#83694F
oklch(54% 0.051 66.4)
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 #57728B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.010
- Dull Blue #49759C ΔE 0.029
- Stormy Blue #507B9C ΔE 0.032
- Cerulean #457B9D ΔE 0.035
- Battleship Gray #6C757D ΔE 0.038
- Grey Blue #647D8E ΔE 0.038
- Muted Blue #3B719F ΔE 0.043
- Battleship Grey #6B7C85 ΔE 0.045
Use #57728B 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.