#57748F
Closest named color: Metallic Blue (#4F738E). oklch(54.7% 0.054 247), rgb(87, 116, 143).
Aa
White text reads best on this color (4.88:1).
About this color
#57748F is a medium-dark, muted blue. In OKLCH its lightness is 55%, its chroma 0.054 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.011 away. White text reads best on it, at 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.30:1 |
| White text | 4.88:1 |
Values
| HEX | #57748F |
| RGB | rgb(87, 116, 143) |
| HSL | hsl(209, 24%, 45%) |
| OKLCH | oklch(54.7% 0.054 247) |
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 #57748F | 4.88:1 | AA | Lc -79.2 | Fine for body text |
| Black text on #57748F | 4.30:1 | AA large text | Lc 30.3 | Non-text elements, placeholder text |
| #57748F text on white | 4.88:1 | AA | Lc 73.8 | Content text, not long reading |
| #57748F text on black | 4.30:1 | AA large text | Lc -27.9 | 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 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
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B5C2D0
oklch(80.8% 0.024 250.1)
-
Step 400
400
#8EA3B8
oklch(70.6% 0.039 248.4)
-
Step 500
500
#718DA7
oklch(63.1% 0.051 246.7)
-
Step 600
600 (this color)
#57748F
oklch(54.7% 0.054 247)
-
Step 700
700
#49647C
oklch(49.2% 0.05 245.9)
-
Step 800
800
#3C5165
oklch(42.6% 0.042 247.6)
-
Step 900
900
#344352
oklch(37.6% 0.032 248.7)
-
Step 950
950
#1E2830
oklch(27.1% 0.02 242.7)
#57748F 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) | #697490 | 0.024 |
| Deuteranopia (no green cones) | #626E8E | 0.021 |
| Tritanopia (no blue cones) | #447A7D | 0.045 |
| Achromatopsia (no color) | #717171 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #57748F
#57748F
oklch(54.7% 0.054 247)
- #866B4F
#866B4F
oklch(54.7% 0.053 67.4)
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 #57748F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.011
- Dull Blue #49759C ΔE 0.024
- Stormy Blue #507B9C ΔE 0.025
- Cerulean #457B9D ΔE 0.029
- Grey Blue #647D8E ΔE 0.034
- Battleship Gray #6C757D ΔE 0.039
- Muted Blue #3B719F ΔE 0.041
- Battleship Grey #6B7C85 ΔE 0.043
Use #57748F 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.