#347DCE
Closest named color: Windows Blue (#3778BF). oklch(58.4% 0.144 253.5), rgb(52, 125, 206).
Aa
Black text reads best on this color (4.97:1).
About this color
#347DCE is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.144 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.025 away. Black text reads best on it, at 4.97:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.97:1 |
| White text | 4.22:1 |
Values
| HEX | #347DCE |
| RGB | rgb(52, 125, 206) |
| HSL | hsl(212, 61%, 51%) |
| OKLCH | oklch(58.4% 0.144 253.5) |
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 #347DCE | 4.22:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #347DCE | 4.97:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #347DCE text on white | 4.22:1 | AA large text | Lc 68.8 | Content text, not long reading |
| #347DCE text on black | 4.97:1 | AA | Lc -32.9 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF1
oklch(88.5% 0.036 253.5)
-
Step 300
300
#A4C4EA
oklch(81% 0.064 253)
-
Step 400
400
#72A4E0
oklch(70.7% 0.103 253.6)
-
Step 500
500
#4B8CD7
oklch(63.1% 0.132 253.5)
-
Step 600
600 (this color)
#347DCE
oklch(58.4% 0.144 253.5)
-
Step 700
700
#1D61AA
oklch(49.1% 0.134 253.7)
-
Step 800
800
#1A508A
oklch(42.8% 0.111 253.3)
-
Step 900
900
#1C436E
oklch(37.8% 0.086 253)
-
Step 950
950
#122740
oklch(26.9% 0.054 254)
#347DCE 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) | #5783D1 | 0.038 |
| Deuteranopia (no green cones) | #3E75CC | 0.021 |
| Tritanopia (no blue cones) | #00909B | 0.110 |
| Achromatopsia (no color) | #7B7B7B | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #347DCE
#347DCE
oklch(58.4% 0.144 253.5)
- #A76E00
#A76E00
oklch(58.4% 0.124 73.4)
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 #347DCE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.025
- Water Blue #0E87CC ΔE 0.030
- Cool Blue #4984B8 ΔE 0.046
- Steel Blue #4682B4 ΔE 0.048
- Nice Blue #107AB0 ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.057
- Flat Blue #3C73A8 ΔE 0.060
- Royal Blue #4169E1 ΔE 0.063
Use #347DCE 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.