#3571DA
Closest named color: Royal Blue (#4169E1). oklch(56.6% 0.173 260.7), rgb(53, 113, 218).
Aa
White text reads best on this color (4.64:1).
About this color
#3571DA is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.173 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.025 away. White text reads best on it, at 4.64:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.173) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.52:1 |
| White text | 4.64:1 |
Values
| HEX | #3571DA |
| RGB | rgb(53, 113, 218) |
| HSL | hsl(218, 69%, 53%) |
| OKLCH | oklch(56.6% 0.173 260.7) |
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 #3571DA | 4.64:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #3571DA | 4.52:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #3571DA text on white | 4.64:1 | AA | Lc 71.8 | Content text, not long reading |
| #3571DA text on black | 4.52:1 | AA | Lc -29.9 | Dividers and decoration only |
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
#E1EAF9
oklch(93.5% 0.023 260.7)
-
Step 200
200
#C9DAF6
oklch(88.4% 0.043 260.4)
-
Step 300
300
#A4C2F4
oklch(81% 0.078 260.5)
-
Step 400
400
#73A0EE
oklch(70.6% 0.125 260.9)
-
Step 500
500
#4E86E8
oklch(63% 0.159 260.8)
-
Step 600
600 (this color)
#3571DA
oklch(56.6% 0.173 260.7)
-
Step 700
700
#255BBA
oklch(49.1% 0.161 260.8)
-
Step 800
800
#204B96
oklch(42.7% 0.132 260.7)
-
Step 900
900
#1F3F78
oklch(37.6% 0.105 261)
-
Step 950
950
#132646
oklch(27.1% 0.065 260.2)
#3571DA 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) | #357DDE | 0.032 |
| Deuteranopia (no green cones) | #006DD8 | 0.028 |
| Tritanopia (no blue cones) | #008A9B | 0.135 |
| Achromatopsia (no color) | #757575 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3571DA
#3571DA
oklch(56.6% 0.173 260.7)
- #996D00
#996D00
oklch(56.5% 0.117 80.6)
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 #3571DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.025
- Cerulean Blue #056EEE ΔE 0.038
- Windows Blue #3778BF ΔE 0.049
- Neon Blue #4361EE ΔE 0.051
- Clear Blue #247AFD ΔE 0.055
- Azul #1D5DEC ΔE 0.062
- Warm Blue #4B57DB ΔE 0.063
- Mid Blue #276AB3 ΔE 0.064
Use #3571DA 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.