#3570E6
Closest named color: Royal Blue (#4169E1). oklch(57.3% 0.19 262.2), rgb(53, 112, 230).
Aa
Black text reads best on this color (4.61:1).
About this color
#3570E6 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.190 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.019 away. Black text reads best on it, at 4.61:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.190) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.61:1 |
| White text | 4.55:1 |
Values
| HEX | #3570E6 |
| RGB | rgb(53, 112, 230) |
| HSL | hsl(220, 78%, 55%) |
| OKLCH | oklch(57.3% 0.19 262.2) |
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 #3570E6 | 4.55:1 | AA | Lc -76.6 | Fine for body text |
| Black text on #3570E6 | 4.61:1 | AA | Lc 33.0 | Non-text elements, placeholder text |
| #3570E6 text on white | 4.55:1 | AA | Lc 71.1 | Content text, not long reading |
| #3570E6 text on black | 4.61:1 | AA | Lc -30.6 | 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 600.
-
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
#C8DAF9
oklch(88.5% 0.047 261.4)
-
Step 300
300
#A3C1F9
oklch(80.9% 0.086 262.7)
-
Step 400
400
#719FF5
oklch(70.7% 0.136 262.1)
-
Step 500
500
#4C84F2
oklch(63.1% 0.175 262.3)
-
Step 600
600 (this color)
#3570E6
oklch(57.3% 0.19 262.2)
-
Step 700
700
#2358C3
oklch(49.1% 0.177 262.2)
-
Step 800
800
#1E499D
oklch(42.7% 0.145 261.9)
-
Step 900
900
#1E3E7D
oklch(37.7% 0.114 262.2)
-
Step 950
950
#122549
oklch(27% 0.071 261.9)
#3570E6 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) | #1F7EEA | 0.035 |
| Deuteranopia (no green cones) | #006EE4 | 0.025 |
| Tritanopia (no blue cones) | #008DA0 | 0.149 |
| Achromatopsia (no color) | #767676 | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3570E6
#3570E6
oklch(57.3% 0.19 262.2)
- #9A7000
#9A7000
oklch(57.2% 0.118 82.4)
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 #3570E6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.019
- Cerulean Blue #056EEE ΔE 0.026
- Neon Blue #4361EE ΔE 0.038
- Clear Blue #247AFD ΔE 0.040
- Bright Blue #0165FC ΔE 0.051
- Azul #1D5DEC ΔE 0.053
- Warm Blue #4B57DB ΔE 0.060
- Windows Blue #3778BF ΔE 0.067
Use #3570E6 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.