#578AAA
Closest named color: Dusty Blue (#5A86AD). oklch(61% 0.073 237.2), rgb(87, 138, 170).
Aa
Black text reads best on this color (5.62:1).
About this color
#578AAA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.073 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Dusty Blue (#5A86AD), ΔE 0.014 away. Black text reads best on it, at 5.62:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Dusty Blue (#5A86AD) |
| Black text | 5.62:1 |
| White text | 3.73:1 |
Values
| HEX | #578AAA |
| RGB | rgb(87, 138, 170) |
| HSL | hsl(203, 33%, 50%) |
| OKLCH | oklch(61% 0.073 237.2) |
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 #578AAA | 3.73:1 | AA large text | Lc -70.3 | Content text, not long reading |
| Black text on #578AAA | 5.62:1 | AA | Lc 39.3 | Non-text elements, placeholder text |
| #578AAA text on white | 3.73:1 | AA large text | Lc 64.8 | Content text, not long reading |
| #578AAA text on black | 5.62:1 | AA | Lc -36.8 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CDDBE5
oklch(88.4% 0.02 238.7)
-
Step 300
300
#ACC5D5
oklch(81% 0.035 236)
-
Step 400
400
#7FA6C0
oklch(70.6% 0.057 237.8)
-
Step 500
500 (this color)
#578AAA
oklch(61% 0.073 237.2)
-
Step 600
600
#427A9C
oklch(55.6% 0.079 237.2)
-
Step 700
700
#336786
oklch(49.2% 0.075 237.1)
-
Step 800
800
#2B546C
oklch(42.7% 0.061 236.3)
-
Step 900
900
#284558
oklch(37.6% 0.048 238.6)
-
Step 950
950
#182933
oklch(27.1% 0.029 235.2)
#578AAA 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) | #7B89AC | 0.044 |
| Deuteranopia (no green cones) | #7080A9 | 0.038 |
| Tritanopia (no blue cones) | #2F9294 | 0.058 |
| Achromatopsia (no color) | #848484 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #578AAA
#578AAA
oklch(61% 0.073 237.2)
- #A57857
#A57857
oklch(61% 0.073 57.1)
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 #578AAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusty Blue #5A86AD ΔE 0.014
- Off Blue #5684AE ΔE 0.020
- Faded Blue #658CBB ΔE 0.032
- Cool Blue #4984B8 ΔE 0.035
- Steel Blue #4682B4 ΔE 0.036
- Blue Grey #758DA3 ΔE 0.039
- Silver Lake Blue #778DA9 ΔE 0.040
- Steel #738595 ΔE 0.042
Use #578AAA 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.