#578FFA
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.3% 0.17 262), rgb(87, 143, 250).
Aa
Black text reads best on this color (6.71:1).
About this color
#578FFA is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.170 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.027 away. Black text reads best on it, at 6.71:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.71:1 |
| White text | 3.12:1 |
Values
| HEX | #578FFA |
| RGB | rgb(87, 143, 250) |
| HSL | hsl(219, 94%, 66%) |
| OKLCH | oklch(66.3% 0.17 262) |
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 #578FFA | 3.12:1 | AA large text | Lc -63.4 | Content text, not long reading |
| Black text on #578FFA | 6.71:1 | AA | Lc 46.0 | Large or bold text, headings |
| #578FFA text on white | 3.12:1 | AA large text | Lc 58.0 | Large or bold text, headings |
| #578FFA text on black | 6.71:1 | AA | Lc -43.7 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C9DAF8
oklch(88.5% 0.045 261.9)
-
Step 300
300
#A3C1F7
oklch(80.8% 0.084 262)
-
Step 400
400
#729FF3
oklch(70.6% 0.133 262.1)
-
Step 500
500 (this color)
#578FFA
oklch(66.3% 0.17 262)
-
Step 600
600
#326BDD
oklch(55.5% 0.185 262.2)
-
Step 700
700
#2559C0
oklch(49.1% 0.171 262.1)
-
Step 800
800
#20499B
oklch(42.6% 0.142 262.2)
-
Step 900
900
#1F3E7B
oklch(37.6% 0.11 262.2)
-
Step 950
950
#122548
oklch(27% 0.07 261.5)
#578FFA 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) | #5C9AFE | 0.030 |
| Deuteranopia (no green cones) | #418BF8 | 0.023 |
| Tritanopia (no blue cones) | #00A8B8 | 0.141 |
| Achromatopsia (no color) | #929292 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #578FFA
#578FFA
oklch(66.3% 0.17 262)
- #BD8900
#BD8900
oklch(66.3% 0.137 81.6)
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 #578FFA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.027
- Soft Blue #6488EA ΔE 0.028
- Cornflower Blue #6495ED ΔE 0.031
- Dodger Blue #1E90FF ΔE 0.036
- Dark Sky Blue #448EE4 ΔE 0.038
- Cornflower #6A79F7 ΔE 0.055
- Lavender Blue #8B88F8 ΔE 0.061
- Perrywinkle #8F8CE7 ΔE 0.070
Use #578FFA 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.