#3671D3
Closest named color: Royal Blue (#4169E1). oklch(56.2% 0.163 260), rgb(54, 113, 211).
Aa
White text reads best on this color (4.70:1).
About this color
#3671D3 is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.163 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.032 away. White text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.45:1 |
| White text | 4.70:1 |
Values
| HEX | #3671D3 |
| RGB | rgb(54, 113, 211) |
| HSL | hsl(217, 64%, 52%) |
| OKLCH | oklch(56.2% 0.163 260) |
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 #3671D3 | 4.70:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #3671D3 | 4.45:1 | AA large text | Lc 31.8 | Non-text elements, placeholder text |
| #3671D3 text on white | 4.70:1 | AA | Lc 72.3 | Content text, not long reading |
| #3671D3 text on black | 4.45:1 | AA large text | Lc -29.4 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF5
oklch(88.5% 0.041 260.9)
-
Step 300
300
#A5C2F1
oklch(80.9% 0.074 260)
-
Step 400
400
#75A1EA
oklch(70.7% 0.118 260.2)
-
Step 500
500
#5088E3
oklch(63.2% 0.15 259.6)
-
Step 600
600 (this color)
#3671D3
oklch(56.2% 0.163 260)
-
Step 700
700
#275CB5
oklch(49% 0.152 260.2)
-
Step 800
800
#214C93
oklch(42.7% 0.127 259.9)
-
Step 900
900
#204075
oklch(37.7% 0.098 259.9)
-
Step 950
950
#132644
oklch(27% 0.061 259.2)
#3671D3 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) | #3D7BD7 | 0.028 |
| Deuteranopia (no green cones) | #146DD1 | 0.024 |
| Tritanopia (no blue cones) | #008898 | 0.127 |
| Achromatopsia (no color) | #737373 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3671D3
#3671D3
oklch(56.2% 0.163 260)
- #986C00
#986C00
oklch(56.2% 0.116 80.4)
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 #3671D3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.032
- Windows Blue #3778BF ΔE 0.039
- Cerulean Blue #056EEE ΔE 0.047
- Mid Blue #276AB3 ΔE 0.054
- French Blue #436BAD ΔE 0.059
- Neon Blue #4361EE ΔE 0.059
- Water Blue #0E87CC ΔE 0.063
- Dark Periwinkle #665FD1 ΔE 0.065
Use #3671D3 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.