#578FEB
Closest named color: Chefchaouen Blue (#4895EF). oklch(65.5% 0.15 259.8), rgb(87, 143, 235).
Aa
Black text reads best on this color (6.53:1).
About this color
#578FEB is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.150 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.018 away. Black text reads best on it, at 6.53:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.53:1 |
| White text | 3.21:1 |
Values
| HEX | #578FEB |
| RGB | rgb(87, 143, 235) |
| HSL | hsl(217, 79%, 63%) |
| OKLCH | oklch(65.5% 0.15 259.8) |
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 #578FEB | 3.21:1 | AA large text | Lc -64.5 | Content text, not long reading |
| Black text on #578FEB | 6.53:1 | AA | Lc 44.9 | Non-text elements, placeholder text |
| #578FEB text on white | 3.21:1 | AA large text | Lc 59.1 | Large or bold text, headings |
| #578FEB text on black | 6.53:1 | AA | Lc -42.6 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF5
oklch(88.5% 0.041 260.9)
-
Step 300
300
#A5C2F1
oklch(80.9% 0.074 260)
-
Step 400
400
#74A1EA
oklch(70.7% 0.118 259.8)
-
Step 500
500 (this color)
#578FEB
oklch(65.5% 0.15 259.8)
-
Step 600
600
#346FD1
oklch(55.5% 0.164 260)
-
Step 700
700
#265DB5
oklch(49.2% 0.151 259.6)
-
Step 800
800
#214C92
oklch(42.6% 0.125 259.7)
-
Step 900
900
#204075
oklch(37.7% 0.098 259.9)
-
Step 950
950
#132644
oklch(27% 0.061 259.2)
#578FEB 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) | #6697EF | 0.028 |
| Deuteranopia (no green cones) | #5189E9 | 0.018 |
| Tritanopia (no blue cones) | #00A4B2 | 0.124 |
| Achromatopsia (no color) | #8F8F8F | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #578FEB
#578FEB
oklch(65.5% 0.15 259.8)
- #BC8500
#BC8500
oklch(65.4% 0.136 79.4)
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 #578FEB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.018
- Soft Blue #6488EA ΔE 0.021
- Dark Sky Blue #448EE4 ΔE 0.021
- Cornflower Blue #6495ED ΔE 0.022
- Dodger Blue #1E90FF ΔE 0.045
- Cornflower #6A79F7 ΔE 0.062
- Perrywinkle #8F8CE7 ΔE 0.067
- Lavender Blue #8B88F8 ΔE 0.067
Use #578FEB 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.