#347CC7
Closest named color: Windows Blue (#3778BF). oklch(57.8% 0.136 252.1), rgb(52, 124, 199).
Aa
Black text reads best on this color (4.85:1).
About this color
#347CC7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.136 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.015 away. Black text reads best on it, at 4.85:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.85:1 |
| White text | 4.32:1 |
Values
| HEX | #347CC7 |
| RGB | rgb(52, 124, 199) |
| HSL | hsl(211, 59%, 49%) |
| OKLCH | oklch(57.8% 0.136 252.1) |
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 #347CC7 | 4.32:1 | AA large text | Lc -75.1 | Fine for body text |
| Black text on #347CC7 | 4.85:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #347CC7 text on white | 4.32:1 | AA large text | Lc 69.6 | Content text, not long reading |
| #347CC7 text on black | 4.85:1 | AA | Lc -32.1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBF0
oklch(88.5% 0.034 253.7)
-
Step 300
300
#A5C4E8
oklch(81% 0.061 252.4)
-
Step 400
400
#73A4DC
oklch(70.6% 0.098 252.5)
-
Step 500
500
#4C8DD3
oklch(63.2% 0.125 251.9)
-
Step 600
600 (this color)
#347CC7
oklch(57.8% 0.136 252.1)
-
Step 700
700
#1F62A6
oklch(49.1% 0.127 252.4)
-
Step 800
800
#1C5086
oklch(42.6% 0.105 252.4)
-
Step 900
900
#1D436B
oklch(37.6% 0.081 251.9)
-
Step 950
950
#12283F
oklch(27.1% 0.051 251.2)
#347CC7 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) | #5981CA | 0.039 |
| Deuteranopia (no green cones) | #4373C6 | 0.025 |
| Tritanopia (no blue cones) | #008E98 | 0.103 |
| Achromatopsia (no color) | #797979 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #347CC7
#347CC7
oklch(57.8% 0.136 252.1)
- #A66B00
#A66B00
oklch(57.7% 0.124 71.6)
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 #347CC7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.015
- Water Blue #0E87CC ΔE 0.031
- Steel Blue #4682B4 ΔE 0.040
- Cool Blue #4984B8 ΔE 0.041
- Nice Blue #107AB0 ΔE 0.042
- Flat Blue #3C73A8 ΔE 0.050
- French Blue #436BAD ΔE 0.055
- Mid Blue #276AB3 ΔE 0.058
Use #347CC7 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.