#3675E7
Closest named color: Royal Blue (#4169E1). oklch(58.4% 0.185 261.1), rgb(54, 117, 231).
Aa
Black text reads best on this color (4.85:1).
About this color
#3675E7 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.185 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.030 away. Black text reads best on it, at 4.85:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.85:1 |
| White text | 4.32:1 |
Values
| HEX | #3675E7 |
| RGB | rgb(54, 117, 231) |
| HSL | hsl(219, 79%, 56%) |
| OKLCH | oklch(58.4% 0.185 261.1) |
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 #3675E7 | 4.32:1 | AA large text | Lc -75.0 | Content text, not long reading |
| Black text on #3675E7 | 4.85:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #3675E7 text on white | 4.32:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #3675E7 text on black | 4.85:1 | AA | Lc -32.2 | 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
#C8DAF8
oklch(88.4% 0.046 260.7)
-
Step 300
300
#A3C2F7
oklch(81% 0.083 261)
-
Step 400
400
#70A0F3
oklch(70.7% 0.133 260.8)
-
Step 500
500
#4B85EF
oklch(63.1% 0.171 261.3)
-
Step 600
600 (this color)
#3675E7
oklch(58.4% 0.185 261.1)
-
Step 700
700
#2159C0
oklch(49% 0.172 261.3)
-
Step 800
800
#1D4A9B
oklch(42.7% 0.141 261)
-
Step 900
900
#1D3F7B
oklch(37.8% 0.11 260.8)
-
Step 950
950
#122548
oklch(27% 0.07 261.5)
#3675E7 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) | #3082EB | 0.033 |
| Deuteranopia (no green cones) | #0072E5 | 0.026 |
| Tritanopia (no blue cones) | #0090A3 | 0.143 |
| Achromatopsia (no color) | #797979 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3675E7
#3675E7
oklch(58.4% 0.185 261.1)
- #A07200
#A07200
oklch(58.4% 0.121 80.5)
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 #3675E7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.030
- Cerulean Blue #056EEE ΔE 0.033
- Clear Blue #247AFD ΔE 0.034
- Neon Blue #4361EE ΔE 0.049
- Bright Blue #0165FC ΔE 0.059
- Cornflower #6A79F7 ΔE 0.062
- Windows Blue #3778BF ΔE 0.063
- Azul #1D5DEC ΔE 0.065
Use #3675E7 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.