#578BAA
Closest named color: Dusty Blue (#5A86AD). oklch(61.3% 0.073 235.9), rgb(87, 139, 170).
Aa
Black text reads best on this color (5.67:1).
About this color
#578BAA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.073 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.017 away. Black text reads best on it, at 5.67:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.67:1 |
| White text | 3.69:1 |
Values
| HEX | #578BAA |
| RGB | rgb(87, 139, 170) |
| HSL | hsl(202, 33%, 50%) |
| OKLCH | oklch(61.3% 0.073 235.9) |
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 #578BAA | 3.69:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #578BAA | 5.67:1 | AA | Lc 39.6 | Non-text elements, placeholder text |
| #578BAA text on white | 3.69:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #578BAA text on black | 5.67:1 | AA | Lc -37.2 | 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
#CDDCE5
oklch(88.6% 0.02 233.9)
-
Step 300
300
#ACC5D5
oklch(81% 0.035 236)
-
Step 400
400
#7EA7C0
oklch(70.7% 0.058 235.4)
-
Step 500
500 (this color)
#578BAA
oklch(61.3% 0.073 235.9)
-
Step 600
600
#417A9C
oklch(55.5% 0.08 236.8)
-
Step 700
700
#336785
oklch(49.1% 0.074 236.2)
-
Step 800
800
#2B546C
oklch(42.7% 0.061 236.3)
-
Step 900
900
#274658
oklch(37.8% 0.048 235.5)
-
Step 950
950
#172933
oklch(27% 0.03 233.8)
#578BAA 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) | #7D8AAC | 0.046 |
| Deuteranopia (no green cones) | #7181AA | 0.039 |
| Tritanopia (no blue cones) | #2F9395 | 0.057 |
| Achromatopsia (no color) | #858585 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #578BAA
#578BAA
oklch(61.3% 0.073 235.9)
- #A67959
#A67959
oklch(61.3% 0.072 56.3)
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 #578BAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.017
- Off Blue #5684AE ΔE 0.023
- Faded Blue #658CBB ΔE 0.032
- Cool Blue #4984B8 ΔE 0.037
- Blue Grey #758DA3 ΔE 0.037
- Silver Lake Blue #778DA9 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.039
- Steel #738595 ΔE 0.042
Use #578BAA 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.