#3347BB
Closest named color: Blue Blue (#2242C7). oklch(45.7% 0.183 269.9), rgb(51, 71, 187).
Aa
White text reads best on this color (7.60:1).
About this color
#3347BB is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.183 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.029 away. White text reads best on it, at 7.60:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.183) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.75:1 |
| White text | 7.60:1 |
Values
| HEX | #3347BB |
| RGB | rgb(51, 71, 187) |
| HSL | hsl(231, 57%, 47%) |
| OKLCH | oklch(45.7% 0.183 269.9) |
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 #3347BB | 7.60:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #3347BB | 2.75:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #3347BB text on white | 7.60:1 | AAA | Lc 85.9 | Fine for body text |
| #3347BB text on black | 2.75:1 | Fails | Lc -16.2 | 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 800.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5D7CFF
oklch(63.2% 0.197 269.9)
-
Step 600
600
#435BFB
oklch(55.6% 0.237 270)
-
Step 700
700
#3649DB
oklch(49.1% 0.221 269.9)
-
Step 800
800 (this color)
#3347BB
oklch(45.7% 0.183 269.9)
-
Step 900
900
#26368C
oklch(37.7% 0.143 270)
-
Step 950
950
#162152
oklch(27.1% 0.09 269.8)
#3347BB 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) | #005ABF | 0.049 |
| Deuteranopia (no green cones) | #004EB9 | 0.033 |
| Tritanopia (no blue cones) | #00657A | 0.146 |
| Achromatopsia (no color) | #545454 | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3347BB
#3347BB
oklch(45.7% 0.183 269.9)
- #6C5400
#6C5400
oklch(45.8% 0.094 89.5)
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 #3347BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.029
- Majorelle Blue #3F37C9 ΔE 0.039
- Blue With A Hint Of Purple #533CC6 ΔE 0.050
- Sapphire #2138AB ΔE 0.051
- Blurple #5539CC ΔE 0.058
- Blueberry #464196 ΔE 0.065
- Bluey Purple #6241C7 ΔE 0.071
- Warm Blue #4B57DB ΔE 0.072
Use #3347BB 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.