#578CAA
Closest named color: Dusty Blue (#5A86AD). oklch(61.5% 0.073 234.5), rgb(87, 140, 170).
Aa
Black text reads best on this color (5.73:1).
About this color
#578CAA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.073 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.019 away. Black text reads best on it, at 5.73:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.73:1 |
| White text | 3.66:1 |
Values
| HEX | #578CAA |
| RGB | rgb(87, 140, 170) |
| HSL | hsl(202, 33%, 50%) |
| OKLCH | oklch(61.5% 0.073 234.5) |
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 #578CAA | 3.66:1 | AA large text | Lc -69.6 | Content text, not long reading |
| Black text on #578CAA | 5.73:1 | AA | Lc 40.0 | Non-text elements, placeholder text |
| #578CAA text on white | 3.66:1 | AA large text | Lc 64.1 | Content text, not long reading |
| #578CAA text on black | 5.73:1 | AA | Lc -37.6 | 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 500.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#ABC5D4
oklch(80.9% 0.035 233.2)
-
Step 400
400
#7EA7BF
oklch(70.7% 0.057 234.3)
-
Step 500
500 (this color)
#578CAA
oklch(61.5% 0.073 234.5)
-
Step 600
600
#407B9B
oklch(55.7% 0.079 234.4)
-
Step 700
700
#326784
oklch(49% 0.073 234.9)
-
Step 800
800
#2A546B
oklch(42.6% 0.061 234.6)
-
Step 900
900
#274657
oklch(37.8% 0.047 233.9)
-
Step 950
950
#172933
oklch(27% 0.03 233.8)
#578CAA 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) | #7E8BAC | 0.047 |
| Deuteranopia (no green cones) | #7282AA | 0.040 |
| Tritanopia (no blue cones) | #2E9496 | 0.055 |
| Achromatopsia (no color) | #868686 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #578CAA
#578CAA
oklch(61.5% 0.073 234.5)
- #A7795A
#A7795A
oklch(61.5% 0.073 54.9)
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 #578CAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.019
- Off Blue #5684AE ΔE 0.026
- Faded Blue #658CBB ΔE 0.032
- Blue Grey #758DA3 ΔE 0.036
- Silver Lake Blue #778DA9 ΔE 0.038
- Cool Blue #4984B8 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.041
- Light Slate Gray #778899 ΔE 0.042
Use #578CAA 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.