#577B95
Closest named color: Stormy Blue (#507B9C). oklch(56.6% 0.057 240.4), rgb(87, 123, 149).
Aa
Black text reads best on this color (4.67:1).
About this color
#577B95 is a medium-dark, muted blue. In OKLCH its lightness is 57%, its chroma 0.057 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Stormy Blue (#507B9C), ΔE 0.013 away. Black text reads best on it, at 4.67:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Stormy Blue (#507B9C) |
| Black text | 4.67:1 |
| White text | 4.49:1 |
Values
| HEX | #577B95 |
| RGB | rgb(87, 123, 149) |
| HSL | hsl(205, 26%, 46%) |
| OKLCH | oklch(56.6% 0.057 240.4) |
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 #577B95 | 4.49:1 | AA large text | Lc -76.6 | Fine for body text |
| Black text on #577B95 | 4.67:1 | AA | Lc 32.9 | Non-text elements, placeholder text |
| #577B95 text on white | 4.49:1 | AA large text | Lc 71.2 | Content text, not long reading |
| #577B95 text on black | 4.67:1 | AA | Lc -30.5 | Non-text elements, placeholder text |
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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E6EBEE
oklch(93.7% 0.007 233.6)
-
Step 200
200
#D1DBE2
oklch(88.6% 0.015 238)
-
Step 300
300
#B2C3D0
oklch(80.8% 0.026 240.7)
-
Step 400
400
#8AA5B8
oklch(70.8% 0.041 238.8)
-
Step 500
500
#6D8EA7
oklch(63.1% 0.053 241.3)
-
Step 600
600 (this color)
#577B95
oklch(56.6% 0.057 240.4)
-
Step 700
700
#44657C
oklch(49.1% 0.053 239.6)
-
Step 800
800
#385265
oklch(42.6% 0.045 240.8)
-
Step 900
900
#314452
oklch(37.6% 0.034 240.7)
-
Step 950
950
#1D2830
oklch(27% 0.021 240.1)
#577B95 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) | #707B96 | 0.033 |
| Deuteranopia (no green cones) | #677495 | 0.027 |
| Tritanopia (no blue cones) | #408183 | 0.046 |
| Achromatopsia (no color) | #777777 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #577B95
#577B95
oklch(56.6% 0.057 240.4)
- #906F54
#906F54
oklch(56.7% 0.057 60.6)
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 #577B95, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Stormy Blue #507B9C ΔE 0.013
- Grey Blue #647D8E ΔE 0.021
- Cerulean #457B9D ΔE 0.022
- Metallic Blue #4F738E ΔE 0.027
- Dull Blue #49759C ΔE 0.029
- Battleship Grey #6B7C85 ΔE 0.035
- Slate Gray #708090 ΔE 0.038
- Off Blue #5684AE ΔE 0.041
Use #577B95 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.