#578FEE
Closest named color: Chefchaouen Blue (#4895EF). oklch(65.6% 0.154 260.3), rgb(87, 143, 238).
Aa
Black text reads best on this color (6.56:1).
About this color
#578FEE is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.154 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 6.56:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.56:1 |
| White text | 3.19:1 |
Values
| HEX | #578FEE |
| RGB | rgb(87, 143, 238) |
| HSL | hsl(218, 82%, 64%) |
| OKLCH | oklch(65.6% 0.154 260.3) |
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 #578FEE | 3.19:1 | AA large text | Lc -64.3 | Content text, not long reading |
| Black text on #578FEE | 6.56:1 | AA | Lc 45.2 | Large or bold text, headings |
| #578FEE text on white | 3.19:1 | AA large text | Lc 58.9 | Large or bold text, headings |
| #578FEE text on black | 6.56:1 | AA | Lc -42.8 | 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
#CADAF6
oklch(88.5% 0.042 261.7)
-
Step 300
300
#A5C2F2
oklch(80.9% 0.075 260.4)
-
Step 400
400
#74A1EB
oklch(70.7% 0.12 260)
-
Step 500
500 (this color)
#578FEE
oklch(65.6% 0.154 260.3)
-
Step 600
600
#336FD3
oklch(55.6% 0.167 260.1)
-
Step 700
700
#265CB7
oklch(49.1% 0.155 260.2)
-
Step 800
800
#214C94
oklch(42.8% 0.128 260.1)
-
Step 900
900
#204076
oklch(37.8% 0.1 260.2)
-
Step 950
950
#132645
oklch(27.1% 0.063 259.7)
#578FEE 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) | #6497F2 | 0.027 |
| Deuteranopia (no green cones) | #4E89EC | 0.019 |
| Tritanopia (no blue cones) | #00A5B3 | 0.128 |
| Achromatopsia (no color) | #909090 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #578FEE
#578FEE
oklch(65.6% 0.154 260.3)
- #BC8600
#BC8600
oklch(65.6% 0.136 80.1)
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 #578FEE, 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
- Cornflower Blue #6495ED ΔE 0.022
- Dark Sky Blue #448EE4 ΔE 0.024
- Dodger Blue #1E90FF ΔE 0.042
- Cornflower #6A79F7 ΔE 0.060
- Lavender Blue #8B88F8 ΔE 0.065
- Perrywinkle #8F8CE7 ΔE 0.067
Use #578FEE 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.