#576CB8
Closest named color: French Blue (#436BAD). oklch(55% 0.121 270.4), rgb(87, 108, 184).
Aa
White text reads best on this color (4.95:1).
About this color
#576CB8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.121 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.030 away. White text reads best on it, at 4.95:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.24:1 |
| White text | 4.95:1 |
Values
| HEX | #576CB8 |
| RGB | rgb(87, 108, 184) |
| HSL | hsl(227, 41%, 53%) |
| OKLCH | oklch(55% 0.121 270.4) |
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 #576CB8 | 4.95:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #576CB8 | 4.24:1 | AA large text | Lc 30.0 | Dividers and decoration only |
| #576CB8 text on white | 4.95:1 | AA | Lc 74.1 | Content text, not long reading |
| #576CB8 text on black | 4.24:1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF5
oklch(93.7% 0.015 270)
-
Step 200
200
#D1D9EE
oklch(88.6% 0.03 269.1)
-
Step 300
300
#B3C0E5
oklch(81% 0.054 269.9)
-
Step 400
400
#8C9ED8
oklch(70.7% 0.088 270.8)
-
Step 500
500
#7085CD
oklch(63.1% 0.111 270.6)
-
Step 600
600 (this color)
#576CB8
oklch(55% 0.121 270.4)
-
Step 700
700
#495BA0
oklch(49% 0.113 270.8)
-
Step 800
800
#3C4B82
oklch(42.8% 0.093 270.6)
-
Step 900
900
#333F68
oklch(37.7% 0.072 270.3)
-
Step 950
950
#1E253D
oklch(27% 0.046 270.7)
#576CB8 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) | #4D75BB | 0.025 |
| Deuteranopia (no green cones) | #426CB6 | 0.025 |
| Tritanopia (no blue cones) | #297C89 | 0.108 |
| Achromatopsia (no color) | #707070 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #576CB8
#576CB8
oklch(55% 0.121 270.4)
- #8B6E00
#8B6E00
oklch(55.1% 0.113 90.4)
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 #576CB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.030
- Windows Blue #3778BF ΔE 0.042
- Flat Blue #3C73A8 ΔE 0.045
- Mid Blue #276AB3 ΔE 0.050
- Muted Blue #3B719F ΔE 0.055
- Dark Periwinkle #665FD1 ΔE 0.057
- Iris #6258C4 ΔE 0.058
- Dull Blue #49759C ΔE 0.059
Use #576CB8 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.