#4578FC
Closest named color: Clear Blue (#247AFD). oklch(61.1% 0.205 265), rgb(69, 120, 252).
Aa
Black text reads best on this color (5.34:1).
About this color
#4578FC is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.205 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.022 away. Black text reads best on it, at 5.34:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.205) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.34:1 |
| White text | 3.92:1 |
Values
| HEX | #4578FC |
| RGB | rgb(69, 120, 252) |
| HSL | hsl(223, 97%, 63%) |
| OKLCH | oklch(61.1% 0.205 265) |
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 #4578FC | 3.92:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #4578FC | 5.34:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #4578FC text on white | 3.92:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #4578FC text on black | 5.34:1 | AA | Lc -35.5 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFE
oklch(93.6% 0.029 264.4)
-
Step 200
200
#C7D9FF
oklch(88.4% 0.056 265.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#719CFF
oklch(70.6% 0.153 265)
-
Step 500
500 (this color)
#4578FC
oklch(61.1% 0.205 265)
-
Step 600
600
#3063F3
oklch(55.6% 0.223 264.9)
-
Step 700
700
#2451D3
oklch(49.1% 0.206 264.8)
-
Step 800
800
#1F43AB
oklch(42.7% 0.172 265.1)
-
Step 900
900
#1D3A87
oklch(37.6% 0.134 264.9)
-
Step 950
950
#11234F
oklch(27% 0.084 264.6)
#4578FC 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) | #1589FF | 0.044 |
| Deuteranopia (no green cones) | #0078F9 | 0.034 |
| Tritanopia (no blue cones) | #0098AE | 0.163 |
| Achromatopsia (no color) | #808080 | 0.205 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4578FC
#4578FC
oklch(61.1% 0.205 265)
- #A67C00
#A67C00
oklch(61.1% 0.125 84.7)
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 #4578FC, closest first.
No curated palette has a color within ΔE 0.04 of #4578FC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.022
- Cornflower #6A79F7 ΔE 0.041
- Cerulean Blue #056EEE ΔE 0.051
- Royal Blue #4169E1 ΔE 0.054
- Neon Blue #4361EE ΔE 0.058
- Dodger Blue #1E90FF ΔE 0.059
- Soft Blue #6488EA ΔE 0.063
- Bright Blue #0165FC ΔE 0.064
Use #4578FC 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.