#577389
Closest named color: Metallic Blue (#4F738E). oklch(54.2% 0.048 242.4), rgb(87, 115, 137).
Aa
White text reads best on this color (4.97:1).
About this color
#577389 is a medium-dark, muted blue. In OKLCH its lightness is 54%, its chroma 0.048 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.012 away. White text reads best on it, at 4.97:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.21:1 |
| White text | 4.97:1 |
Values
| HEX | #577389 |
| RGB | rgb(87, 115, 137) |
| HSL | hsl(206, 22%, 44%) |
| OKLCH | oklch(54.2% 0.048 242.4) |
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 #577389 | 4.97:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #577389 | 4.21:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #577389 text on white | 4.97:1 | AA | Lc 74.4 | Content text, not long reading |
| #577389 text on black | 4.21:1 | AA large text | Lc -27.3 | 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
#D3DAE0
oklch(88.5% 0.011 243.7)
-
Step 300
300
#B5C3CE
oklch(81% 0.022 241.4)
-
Step 400
400
#8FA4B5
oklch(70.8% 0.034 242.6)
-
Step 500
500
#738DA2
oklch(63.1% 0.043 242.8)
-
Step 600
600 (this color)
#577389
oklch(54.2% 0.048 242.4)
-
Step 700
700
#4B6478
oklch(49.1% 0.044 242.9)
-
Step 800
800
#3D5262
oklch(42.8% 0.037 241.5)
-
Step 900
900
#344450
oklch(37.8% 0.029 240.9)
-
Step 950
950
#1F282F
oklch(27.1% 0.018 241.7)
#577389 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) | #6A738A | 0.026 |
| Deuteranopia (no green cones) | #636D89 | 0.022 |
| Tritanopia (no blue cones) | #46787A | 0.038 |
| Achromatopsia (no color) | #707070 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577389
#577389
oklch(54.2% 0.048 242.4)
- #846953
#846953
oklch(54.2% 0.048 60.7)
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 #577389, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.012
- Dull Blue #49759C ΔE 0.032
- Stormy Blue #507B9C ΔE 0.032
- Battleship Gray #6C757D ΔE 0.035
- Grey Blue #647D8E ΔE 0.035
- Cerulean #457B9D ΔE 0.036
- Battleship Grey #6B7C85 ΔE 0.041
- Muted Blue #3B719F ΔE 0.047
Use #577389 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.