#577188
Closest named color: Metallic Blue (#4F738E). oklch(53.7% 0.047 245.5), rgb(87, 113, 136).
Aa
White text reads best on this color (5.09:1).
About this color
#577188 is a medium-dark, muted blue. In OKLCH its lightness is 54%, its chroma 0.047 and its hue 246°. 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 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.12:1 |
| White text | 5.09:1 |
Values
| HEX | #577188 |
| RGB | rgb(87, 113, 136) |
| HSL | hsl(208, 22%, 44%) |
| OKLCH | oklch(53.7% 0.047 245.5) |
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 #577188 | 5.09:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #577188 | 4.12:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #577188 text on white | 5.09:1 | AA | Lc 75.1 | Fine for body text |
| #577188 text on black | 4.12:1 | AA large text | Lc -26.6 | 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
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D3DAE1
oklch(88.5% 0.012 248)
-
Step 300
300
#B6C2CE
oklch(80.8% 0.022 248.1)
-
Step 400
400
#90A3B5
oklch(70.7% 0.034 246.9)
-
Step 500
500
#748DA3
oklch(63.2% 0.044 245.1)
-
Step 600
600 (this color)
#577188
oklch(53.7% 0.047 245.5)
-
Step 700
700
#4C6479
oklch(49.2% 0.044 245.3)
-
Step 800
800
#3E5162
oklch(42.6% 0.037 245.8)
-
Step 900
900
#354350
oklch(37.6% 0.029 246.7)
-
Step 950
950
#1F272F
oklch(26.9% 0.019 248.5)
#577188 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) | #687189 | 0.023 |
| Deuteranopia (no green cones) | #626C88 | 0.020 |
| Tritanopia (no blue cones) | #477678 | 0.039 |
| Achromatopsia (no color) | #6E6E6E | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577188
#577188
oklch(53.7% 0.047 245.5)
- #816951
#816951
oklch(53.8% 0.047 66.6)
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 #577188, 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 0.033
- Stormy Blue #507B9C ΔE 0.036
- Battleship Gray #6C757D ΔE 0.037
- Cerulean #457B9D ΔE 0.039
- Grey Blue #647D8E ΔE 0.041
- Slate #516572 ΔE 0.045
- Muted Blue #3B719F ΔE 0.046
Use #577188 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.