#3475E9
Closest named color: Cerulean Blue (#056EEE). oklch(58.5% 0.188 260.9), rgb(52, 117, 233).
Aa
Black text reads best on this color (4.86:1).
About this color
#3475E9 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.188 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.031 away. Black text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.86:1 |
| White text | 4.31:1 |
Values
| HEX | #3475E9 |
| RGB | rgb(52, 117, 233) |
| HSL | hsl(218, 80%, 56%) |
| OKLCH | oklch(58.5% 0.188 260.9) |
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 #3475E9 | 4.31:1 | AA large text | Lc -74.8 | Content text, not long reading |
| Black text on #3475E9 | 4.86:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #3475E9 text on white | 4.31:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #3475E9 text on black | 4.86:1 | AA | Lc -32.3 | 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
#A2C2F8
oklch(81% 0.084 260.7)
-
Step 400
400
#6FA0F4
oklch(70.7% 0.135 260.7)
-
Step 500
500
#4985F0
oklch(63% 0.173 261)
-
Step 600
600 (this color)
#3475E9
oklch(58.5% 0.188 260.9)
-
Step 700
700
#1E59C2
oklch(49.1% 0.176 261)
-
Step 800
800
#1B4A9D
oklch(42.8% 0.145 260.8)
-
Step 900
900
#1C3E7C
oklch(37.6% 0.113 261.2)
-
Step 950
950
#112549
oklch(27% 0.072 261.1)
#3475E9 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) | #2C82ED | 0.033 |
| Deuteranopia (no green cones) | #0072E7 | 0.024 |
| Tritanopia (no blue cones) | #0091A4 | 0.146 |
| Achromatopsia (no color) | #7A7A7A | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3475E9
#3475E9
oklch(58.5% 0.188 260.9)
- #A07300
#A07300
oklch(58.6% 0.121 81.3)
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 #3475E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.031
- Royal Blue #4169E1 ΔE 0.031
- Clear Blue #247AFD ΔE 0.032
- Neon Blue #4361EE ΔE 0.048
- Bright Blue #0165FC ΔE 0.056
- Cornflower #6A79F7 ΔE 0.062
- Azul #1D5DEC ΔE 0.063
- Windows Blue #3778BF ΔE 0.066
Use #3475E9 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.