#577489
Closest named color: Metallic Blue (#4F738E). oklch(54.4% 0.047 240.2), rgb(87, 116, 137).
Aa
White text reads best on this color (4.92:1).
About this color
#577489 is a medium-dark, muted blue. In OKLCH its lightness is 54%, its chroma 0.047 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.013 away. White text reads best on it, at 4.92:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.26:1 |
| White text | 4.92:1 |
Values
| HEX | #577489 |
| RGB | rgb(87, 116, 137) |
| HSL | hsl(205, 22%, 44%) |
| OKLCH | oklch(54.4% 0.047 240.2) |
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 #577489 | 4.92:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #577489 | 4.26:1 | AA large text | Lc 30.0 | Non-text elements, placeholder text |
| #577489 text on white | 4.92:1 | AA | Lc 74.1 | Content text, not long reading |
| #577489 text on black | 4.26:1 | AA large text | Lc -27.6 | 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
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE0
oklch(88.4% 0.012 239.9)
-
Step 300
300
#B5C3CD
oklch(80.9% 0.021 238.7)
-
Step 400
400
#8EA4B4
oklch(70.7% 0.034 239.6)
-
Step 500
500
#728DA1
oklch(63% 0.043 240.4)
-
Step 600
600 (this color)
#577489
oklch(54.4% 0.047 240.2)
-
Step 700
700
#4A6477
oklch(49% 0.043 240.5)
-
Step 800
800
#3D5261
oklch(42.7% 0.036 239.7)
-
Step 900
900
#34444F
oklch(37.7% 0.028 238.5)
-
Step 950
950
#1F282E
oklch(27.1% 0.017 237.4)
#577489 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) | #6B748A | 0.027 |
| Deuteranopia (no green cones) | #646E89 | 0.023 |
| Tritanopia (no blue cones) | #46797B | 0.037 |
| Achromatopsia (no color) | #707070 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577489
#577489
oklch(54.4% 0.047 240.2)
- #856A54
#856A54
oklch(54.5% 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 #577489, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.013
- Stormy Blue #507B9C ΔE 0.031
- Dull Blue #49759C ΔE 0.032
- Grey Blue #647D8E ΔE 0.033
- Battleship Gray #6C757D ΔE 0.033
- Cerulean #457B9D ΔE 0.035
- Battleship Grey #6B7C85 ΔE 0.039
- Muted Blue #3B719F ΔE 0.048
Use #577489 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.