#576D9B
Closest named color: Dull Blue (#49759C). oklch(53.7% 0.077 264.3), rgb(87, 109, 155).
Aa
White text reads best on this color (5.16:1).
About this color
#576D9B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.077 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.026 away. White text reads best on it, at 5.16:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.06:1 |
| White text | 5.16:1 |
Values
| HEX | #576D9B |
| RGB | rgb(87, 109, 155) |
| HSL | hsl(221, 28%, 47%) |
| OKLCH | oklch(53.7% 0.077 264.3) |
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 #576D9B | 5.16:1 | AA | Lc -80.9 | Fine for body text |
| Black text on #576D9B | 4.06:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #576D9B text on white | 5.16:1 | AA | Lc 75.5 | Fine for body text |
| #576D9B text on black | 4.06:1 | AA large text | Lc -26.2 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D3D9E6
oklch(88.5% 0.019 266)
-
Step 300
300
#B5C1D8
oklch(80.9% 0.035 263.5)
-
Step 400
400
#8FA1C4
oklch(70.7% 0.055 263.6)
-
Step 500
500
#7489B5
oklch(63.1% 0.071 264.7)
-
Step 600
600 (this color)
#576D9B
oklch(53.7% 0.077 264.3)
-
Step 700
700
#4C608A
oklch(49.1% 0.072 264.4)
-
Step 800
800
#3E4F70
oklch(42.8% 0.059 263.1)
-
Step 900
900
#35415B
oklch(37.6% 0.048 265.1)
-
Step 950
950
#1F2635
oklch(26.9% 0.03 265.1)
#576D9B 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) | #5D719D | 0.015 |
| Deuteranopia (no green cones) | #556A9A | 0.009 |
| Tritanopia (no blue cones) | #3F777D | 0.070 |
| Achromatopsia (no color) | #6D6D6D | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #576D9B
#576D9B
oklch(53.7% 0.077 264.3)
- #836A35
#836A35
oklch(53.7% 0.078 84.4)
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 #576D9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.026
- Muted Blue #3B719F ΔE 0.031
- Metallic Blue #4F738E ΔE 0.032
- Flat Blue #3C73A8 ΔE 0.034
- French Blue #436BAD ΔE 0.038
- Stormy Blue #507B9C ΔE 0.040
- Cerulean #457B9D ΔE 0.042
- Dusky Blue #475F94 ΔE 0.048
Use #576D9B 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.