#3A84BD
Closest named color: Cool Blue (#4984B8). oklch(59.3% 0.114 244.8), rgb(58, 132, 189).
Aa
Black text reads best on this color (5.21:1).
About this color
#3A84BD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.114 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.014 away. Black text reads best on it, at 5.21:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.21:1 |
| White text | 4.02:1 |
Values
| HEX | #3A84BD |
| RGB | rgb(58, 132, 189) |
| HSL | hsl(206, 53%, 48%) |
| OKLCH | oklch(59.3% 0.114 244.8) |
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 #3A84BD | 4.02:1 | AA large text | Lc -72.8 | Content text, not long reading |
| Black text on #3A84BD | 5.21:1 | AA | Lc 36.8 | Non-text elements, placeholder text |
| #3A84BD text on white | 4.02:1 | AA large text | Lc 67.3 | Content text, not long reading |
| #3A84BD text on black | 5.21:1 | AA | Lc -34.4 | 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
#A6C5E0
oklch(81% 0.051 244.8)
-
Step 400
400
#74A6D1
oklch(70.6% 0.083 245.3)
-
Step 500
500
#4E90C5
oklch(63.2% 0.105 244.8)
-
Step 600
600 (this color)
#3A84BD
oklch(59.3% 0.114 244.8)
-
Step 700
700
#206698
oklch(49.2% 0.105 244.3)
-
Step 800
800
#1D537C
oklch(42.7% 0.088 245.2)
-
Step 900
900
#1E4563
oklch(37.7% 0.068 244.3)
-
Step 950
950
#13283A
oklch(26.9% 0.043 246.2)
#3A84BD 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) | #6A86C0 | 0.050 |
| Deuteranopia (no green cones) | #5879BC | 0.038 |
| Tritanopia (no blue cones) | #009298 | 0.084 |
| Achromatopsia (no color) | #7F7F7F | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A84BD
#3A84BD
oklch(59.3% 0.114 244.8)
- #AC6E29
#AC6E29
oklch(59.3% 0.114 64.7)
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 #3A84BD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.014
- Steel Blue #4682B4 ΔE 0.015
- Water Blue #0E87CC ΔE 0.028
- Off Blue #5684AE ΔE 0.033
- Blue NCS #118AB2 ΔE 0.033
- Windows Blue #3778BF ΔE 0.036
- Dusty Blue #5A86AD ΔE 0.039
- Nice Blue #107AB0 ΔE 0.043
Use #3A84BD 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.