#3F6ABE
Closest named color: Mid Blue (#276AB3). oklch(53.6% 0.14 262.3), rgb(63, 106, 190).
Aa
White text reads best on this color (5.22:1).
About this color
#3F6ABE is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.140 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.028 away. White text reads best on it, at 5.22:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.01:1 |
| White text | 5.22:1 |
Values
| HEX | #3F6ABE |
| RGB | rgb(63, 106, 190) |
| HSL | hsl(220, 50%, 50%) |
| OKLCH | oklch(53.6% 0.14 262.3) |
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 #3F6ABE | 5.22:1 | AA | Lc -81.0 | Fine for body text |
| Black text on #3F6ABE | 4.01:1 | AA large text | Lc 28.4 | Dividers and decoration only |
| #3F6ABE text on white | 5.22:1 | AA | Lc 75.7 | Fine for body text |
| #3F6ABE text on black | 4.01:1 | AA large text | Lc -26.1 | 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 600.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF1
oklch(88.6% 0.035 262)
-
Step 300
300
#ABC1EA
oklch(80.8% 0.063 262.8)
-
Step 400
400
#7EA0E0
oklch(70.6% 0.102 262.6)
-
Step 500
500
#5E88D7
oklch(63.2% 0.128 262.1)
-
Step 600
600 (this color)
#3F6ABE
oklch(53.6% 0.14 262.3)
-
Step 700
700
#365DAA
oklch(49.1% 0.131 262.4)
-
Step 800
800
#2D4C89
oklch(42.5% 0.108 262.5)
-
Step 900
900
#28406E
oklch(37.6% 0.085 262.3)
-
Step 950
950
#182640
oklch(27% 0.052 262)
#3F6ABE 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) | #4273C1 | 0.025 |
| Deuteranopia (no green cones) | #2C67BC | 0.020 |
| Tritanopia (no blue cones) | #007D8B | 0.114 |
| Achromatopsia (no color) | #6C6C6C | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F6ABE
#3F6ABE
oklch(53.6% 0.14 262.3)
- #8D6600
#8D6600
oklch(53.6% 0.11 82.2)
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 #3F6ABE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.028
- French Blue #436BAD ΔE 0.028
- Windows Blue #3778BF ΔE 0.038
- Flat Blue #3C73A8 ΔE 0.047
- Royal Blue #4169E1 ΔE 0.055
- Muted Blue #3B719F ΔE 0.057
- Nice Blue #107AB0 ΔE 0.058
- Iris #6258C4 ΔE 0.061
Use #3F6ABE 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.