#578BEE
Closest named color: Soft Blue (#6488EA). oklch(64.8% 0.159 262), rgb(87, 139, 238).
Aa
Black text reads best on this color (6.33:1).
About this color
#578BEE is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.159 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.015 away. Black text reads best on it, at 6.33:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.33:1 |
| White text | 3.31:1 |
Values
| HEX | #578BEE |
| RGB | rgb(87, 139, 238) |
| HSL | hsl(219, 82%, 64%) |
| OKLCH | oklch(64.8% 0.159 262) |
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 #578BEE | 3.31:1 | AA large text | Lc -65.7 | Content text, not long reading |
| Black text on #578BEE | 6.33:1 | AA | Lc 43.8 | Non-text elements, placeholder text |
| #578BEE text on white | 3.31:1 | AA large text | Lc 60.3 | Content text, not long reading |
| #578BEE text on black | 6.33:1 | AA | Lc -41.4 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF6
oklch(88.5% 0.042 261.7)
-
Step 300
300
#A5C1F3
oklch(80.8% 0.077 261.9)
-
Step 400
400
#76A0EE
oklch(70.8% 0.124 262.1)
-
Step 500
500 (this color)
#578BEE
oklch(64.8% 0.159 262)
-
Step 600
600
#376DD6
oklch(55.6% 0.172 262)
-
Step 700
700
#2A5ABA
oklch(49.1% 0.161 262.2)
-
Step 800
800
#234A96
oklch(42.6% 0.133 262)
-
Step 900
900
#213F78
oklch(37.7% 0.104 261.8)
-
Step 950
950
#142546
oklch(26.9% 0.066 262.3)
#578BEE 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) | #5E95F2 | 0.028 |
| Deuteranopia (no green cones) | #4787EC | 0.020 |
| Tritanopia (no blue cones) | #00A2B1 | 0.133 |
| Achromatopsia (no color) | #8D8D8D | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #578BEE
#578BEE
oklch(64.8% 0.159 262)
- #B78500
#B78500
oklch(64.9% 0.134 81.9)
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 #578BEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.015
- Dark Sky Blue #448EE4 ΔE 0.025
- Chefchaouen Blue #4895EF ΔE 0.027
- Cornflower Blue #6495ED ΔE 0.032
- Dodger Blue #1E90FF ΔE 0.042
- Cornflower #6A79F7 ΔE 0.051
- Lavender Blue #8B88F8 ΔE 0.065
- Clear Blue #247AFD ΔE 0.068
Use #578BEE 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.