#577B85
Closest named color: Grey Blue (#647D8E). oklch(56% 0.043 216.9), rgb(87, 123, 133).
Aa
White text reads best on this color (4.58:1).
About this color
#577B85 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 56%, its chroma 0.043 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.023 away. White text reads best on it, at 4.58:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.57:1 |
| White text | 4.58:1 |
Values
| HEX | #577B85 |
| RGB | rgb(87, 123, 133) |
| HSL | hsl(193, 21%, 43%) |
| OKLCH | oklch(56% 0.043 216.9) |
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 #577B85 | 4.58:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #577B85 | 4.57:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #577B85 text on white | 4.58:1 | AA | Lc 71.8 | Content text, not long reading |
| #577B85 text on black | 4.57:1 | AA | Lc -29.8 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D2DBDE
oklch(88.5% 0.011 219.6)
-
Step 300
300
#B3C4C9
oklch(80.9% 0.02 217.3)
-
Step 400
400
#8BA6AD
oklch(70.7% 0.032 215.2)
-
Step 500
500
#6E9099
oklch(63.1% 0.04 215.8)
-
Step 600
600 (this color)
#577B85
oklch(56% 0.043 216.9)
-
Step 700
700
#466770
oklch(49.2% 0.041 216.6)
-
Step 800
800
#3A545B
oklch(42.8% 0.033 216.3)
-
Step 900
900
#32454B
oklch(37.7% 0.026 219.2)
-
Step 950
950
#1D292C
oklch(27.1% 0.017 214.8)
#577B85 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) | #747986 | 0.039 |
| Deuteranopia (no green cones) | #6D7385 | 0.035 |
| Tritanopia (no blue cones) | #477F7E | 0.026 |
| Achromatopsia (no color) | #757575 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577B85
#577B85
oklch(56% 0.043 216.9)
- #8C6C62
#8C6C62
oklch(56% 0.044 38.1)
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 #577B85, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.023
- Battleship Grey #6B7C85 ΔE 0.026
- Battleship Gray #6C757D ΔE 0.030
- Metallic Blue #4F738E ΔE 0.034
- Stormy Blue #507B9C ΔE 0.037
- Steel Grey #6F828A ΔE 0.039
- Slate Gray #708090 ΔE 0.040
- Cerulean #457B9D ΔE 0.041
Use #577B85 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.