#578BD2
Closest named color: Dark Sky Blue (#448EE4). oklch(63.2% 0.121 256.5), rgb(87, 139, 210).
Aa
Black text reads best on this color (6.02:1).
About this color
#578BD2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.121 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.030 away. Black text reads best on it, at 6.02:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.02:1 |
| White text | 3.48:1 |
Values
| HEX | #578BD2 |
| RGB | rgb(87, 139, 210) |
| HSL | hsl(215, 58%, 58%) |
| OKLCH | oklch(63.2% 0.121 256.5) |
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 #578BD2 | 3.48:1 | AA large text | Lc -67.7 | Content text, not long reading |
| Black text on #578BD2 | 6.02:1 | AA | Lc 41.9 | Non-text elements, placeholder text |
| #578BD2 text on white | 3.48:1 | AA large text | Lc 62.2 | Content text, not long reading |
| #578BD2 text on black | 6.02:1 | AA | Lc -39.5 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF6
oklch(93.7% 0.017 256.3)
-
Step 200
200
#CBDAEF
oklch(88.4% 0.033 256.8)
-
Step 300
300
#A8C3E7
oklch(80.9% 0.059 255.7)
-
Step 400
400
#7AA3DB
oklch(70.8% 0.094 256.4)
-
Step 500
500 (this color)
#578BD2
oklch(63.2% 0.121 256.5)
-
Step 600
600
#3B73BF
oklch(55.5% 0.133 256.7)
-
Step 700
700
#2D60A5
oklch(49% 0.124 256.8)
-
Step 800
800
#264F85
oklch(42.7% 0.101 256.2)
-
Step 900
900
#24426B
oklch(37.7% 0.079 256.6)
-
Step 950
950
#16273F
oklch(27.1% 0.05 257.1)
#578BD2 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) | #6D90D5 | 0.030 |
| Deuteranopia (no green cones) | #5D84D1 | 0.019 |
| Tritanopia (no blue cones) | #009BA5 | 0.104 |
| Achromatopsia (no color) | #898989 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #578BD2
#578BD2
oklch(63.2% 0.121 256.5)
- #B37E21
#B37E21
oklch(63.1% 0.121 76.1)
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 #578BD2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.030
- Faded Blue #658CBB ΔE 0.038
- Soft Blue #6488EA ΔE 0.042
- Cool Blue #4984B8 ΔE 0.045
- Chefchaouen Blue #4895EF ΔE 0.046
- Cornflower Blue #6495ED ΔE 0.048
- Water Blue #0E87CC ΔE 0.050
- Steel Blue #4682B4 ΔE 0.053
Use #578BD2 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.