#3B84BB
Closest named color: Cool Blue (#4984B8). oklch(59.2% 0.111 244.2), rgb(59, 132, 187).
Aa
Black text reads best on this color (5.20:1).
About this color
#3B84BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.111 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.012 away. Black text reads best on it, at 5.20:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.20:1 |
| White text | 4.03:1 |
Values
| HEX | #3B84BB |
| RGB | rgb(59, 132, 187) |
| HSL | hsl(206, 52%, 48%) |
| OKLCH | oklch(59.2% 0.111 244.2) |
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 #3B84BB | 4.03:1 | AA large text | Lc -72.8 | Content text, not long reading |
| Black text on #3B84BB | 5.20:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #3B84BB text on white | 4.03:1 | AA large text | Lc 67.3 | Content text, not long reading |
| #3B84BB text on black | 5.20:1 | AA | Lc -34.3 | 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
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A6C5DF
oklch(80.9% 0.05 243.7)
-
Step 400
400
#75A6CF
oklch(70.6% 0.08 244.5)
-
Step 500
500
#4F90C3
oklch(63.2% 0.102 244.1)
-
Step 600
600 (this color)
#3B84BB
oklch(59.2% 0.111 244.2)
-
Step 700
700
#216697
oklch(49.2% 0.103 244.1)
-
Step 800
800
#1E537A
oklch(42.7% 0.085 244.2)
-
Step 900
900
#1F4562
oklch(37.7% 0.066 243.9)
-
Step 950
950
#13293A
oklch(27.2% 0.042 243.6)
#3B84BB 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 | 0.050 |
| Deuteranopia (no green cones) | #5A79BA | 0.039 |
| Tritanopia (no blue cones) | #009197 | 0.081 |
| Achromatopsia (no color) | #7E7E7E | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B84BB
#3B84BB
oklch(59.2% 0.111 244.2)
- #AB6E2D
#AB6E2D
oklch(59.2% 0.111 64.1)
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 #3B84BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.012
- Steel Blue #4682B4 ΔE 0.013
- Water Blue #0E87CC ΔE 0.030
- Off Blue #5684AE ΔE 0.030
- Blue NCS #118AB2 ΔE 0.031
- Dusty Blue #5A86AD ΔE 0.037
- Windows Blue #3778BF ΔE 0.037
- Nice Blue #107AB0 ΔE 0.042
Use #3B84BB 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.