#578FF4
Closest named color: Chefchaouen Blue (#4895EF). oklch(66% 0.162 261.2), rgb(87, 143, 244).
Aa
Black text reads best on this color (6.64:1).
About this color
#578FF4 is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.162 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.021 away. Black text reads best on it, at 6.64:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.64:1 |
| White text | 3.16:1 |
Values
| HEX | #578FF4 |
| RGB | rgb(87, 143, 244) |
| HSL | hsl(219, 88%, 65%) |
| OKLCH | oklch(66% 0.162 261.2) |
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 #578FF4 | 3.16:1 | AA large text | Lc -63.9 | Content text, not long reading |
| Black text on #578FF4 | 6.64:1 | AA | Lc 45.6 | Large or bold text, headings |
| #578FF4 text on white | 3.16:1 | AA large text | Lc 58.5 | Large or bold text, headings |
| #578FF4 text on black | 6.64:1 | AA | Lc -43.3 | 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
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF7
oklch(88.5% 0.044 261.2)
-
Step 300
300
#A4C2F4
oklch(81% 0.078 260.5)
-
Step 400
400
#73A0EF
oklch(70.7% 0.126 261.1)
-
Step 500
500 (this color)
#578FF4
oklch(66% 0.162 261.2)
-
Step 600
600
#326DD8
oklch(55.5% 0.176 261.1)
-
Step 700
700
#255ABC
oklch(49% 0.165 261.3)
-
Step 800
800
#204A98
oklch(42.6% 0.136 261.4)
-
Step 900
900
#1F3F79
oklch(37.7% 0.106 261.2)
-
Step 950
950
#132547
oklch(26.9% 0.068 261.9)
#578FF4 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) | #6199F8 | 0.029 |
| Deuteranopia (no green cones) | #488AF2 | 0.021 |
| Tritanopia (no blue cones) | #00A6B6 | 0.133 |
| Achromatopsia (no color) | #919191 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #578FF4
#578FF4
oklch(66% 0.162 261.2)
- #BC8800
#BC8800
oklch(66% 0.136 81.4)
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 #578FF4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.021
- Soft Blue #6488EA ΔE 0.023
- Cornflower Blue #6495ED ΔE 0.025
- Dark Sky Blue #448EE4 ΔE 0.030
- Dodger Blue #1E90FF ΔE 0.038
- Cornflower #6A79F7 ΔE 0.057
- Lavender Blue #8B88F8 ΔE 0.063
- Perrywinkle #8F8CE7 ΔE 0.068
Use #578FF4 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.