#57728F
Closest named color: Metallic Blue (#4F738E). oklch(54.2% 0.056 250.7), rgb(87, 114, 143).
Aa
White text reads best on this color (4.98:1).
About this color
#57728F is a medium-dark, muted blue. In OKLCH its lightness is 54%, its chroma 0.056 and its hue 251°. 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 4.98:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.20:1 |
| White text | 4.98:1 |
Values
| HEX | #57728F |
| RGB | rgb(87, 114, 143) |
| HSL | hsl(211, 24%, 45%) |
| OKLCH | oklch(54.2% 0.056 250.7) |
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 #57728F | 4.98:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #57728F | 4.20:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #57728F text on white | 4.98:1 | AA | Lc 74.5 | Content text, not long reading |
| #57728F text on black | 4.20:1 | AA large text | Lc -27.2 | 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
#D3DAE2
oklch(88.5% 0.013 251.6)
-
Step 300
300
#B5C2D1
oklch(80.9% 0.026 251.9)
-
Step 400
400
#8FA3B9
oklch(70.7% 0.039 250.9)
-
Step 500
500
#738CA8
oklch(63.1% 0.051 251.5)
-
Step 600
600 (this color)
#57728F
oklch(54.2% 0.056 250.7)
-
Step 700
700
#4B637D
oklch(49.1% 0.051 250.9)
-
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)
#57728F 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) | #677390 | 0.022 |
| Deuteranopia (no green cones) | #606D8E | 0.017 |
| Tritanopia (no blue cones) | #44797C | 0.048 |
| Achromatopsia (no color) | #6F6F6F | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57728F
#57728F
oklch(54.2% 0.056 250.7)
- #846A4B
#846A4B
oklch(54.2% 0.056 71.1)
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 #57728F, 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 0.024
- Stormy Blue #507B9C ΔE 0.028
- Cerulean #457B9D ΔE 0.032
- Muted Blue #3B719F ΔE 0.039
- Grey Blue #647D8E ΔE 0.039
- Battleship Gray #6C757D ΔE 0.042
- Flat Blue #3C73A8 ΔE 0.046
Use #57728F 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.