#3384BB
Closest named color: Steel Blue (#4682B4). oklch(58.9% 0.115 242.3), rgb(51, 132, 187).
Aa
Black text reads best on this color (5.15:1).
About this color
#3384BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.115 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.017 away. Black text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #3384BB |
| RGB | rgb(51, 132, 187) |
| HSL | hsl(204, 57%, 47%) |
| OKLCH | oklch(58.9% 0.115 242.3) |
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 #3384BB | 4.07:1 | AA large text | Lc -73.1 | Content text, not long reading |
| Black text on #3384BB | 5.15:1 | AA | Lc 36.5 | Non-text elements, placeholder text |
| #3384BB text on white | 4.07:1 | AA large text | Lc 67.6 | Content text, not long reading |
| #3384BB text on black | 5.15:1 | AA | Lc -34.1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#C9DCEB
oklch(88.5% 0.029 241.6)
-
Step 300
300
#A4C5E0
oklch(80.8% 0.052 243.1)
-
Step 400
400
#72A7D0
oklch(70.7% 0.082 242.6)
-
Step 500
500
#4991C4
oklch(63.2% 0.106 241.9)
-
Step 600
600 (this color)
#3384BB
oklch(58.9% 0.115 242.3)
-
Step 700
700
#186698
oklch(49% 0.107 242.8)
-
Step 800
800
#18547B
oklch(42.8% 0.088 242.1)
-
Step 900
900
#1B4563
oklch(37.6% 0.069 242.8)
-
Step 950
950
#11293A
oklch(27% 0.044 241.7)
#3384BB 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) | #6B85BD | 0.056 |
| Deuteranopia (no green cones) | #5878BA | 0.043 |
| Tritanopia (no blue cones) | #009297 | 0.081 |
| Achromatopsia (no color) | #7E7E7E | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3384BB
#3384BB
oklch(58.9% 0.115 242.3)
- #AD6C2A
#AD6C2A
oklch(59% 0.115 62.3)
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 #3384BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.017
- Cool Blue #4984B8 ΔE 0.018
- Water Blue #0E87CC ΔE 0.028
- Blue NCS #118AB2 ΔE 0.028
- Off Blue #5684AE ΔE 0.035
- Windows Blue #3778BF ΔE 0.036
- Nice Blue #107AB0 ΔE 0.038
- Dusty Blue #5A86AD ΔE 0.041
Use #3384BB 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.