#3F6BC2
Closest named color: Mid Blue (#276AB3). oklch(54.1% 0.144 262.4), rgb(63, 107, 194).
Aa
White text reads best on this color (5.13:1).
About this color
#3F6BC2 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.144 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.032 away. White text reads best on it, at 5.13:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.09:1 |
| White text | 5.13:1 |
Values
| HEX | #3F6BC2 |
| RGB | rgb(63, 107, 194) |
| HSL | hsl(220, 52%, 50%) |
| OKLCH | oklch(54.1% 0.144 262.4) |
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 #3F6BC2 | 5.13:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #3F6BC2 | 4.09:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #3F6BC2 text on white | 5.13:1 | AA | Lc 75.1 | Fine for body text |
| #3F6BC2 text on black | 4.09:1 | AA large text | Lc -26.6 | 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
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF2
oklch(88.5% 0.036 261.3)
-
Step 300
300
#AAC1EB
oklch(80.8% 0.065 262.4)
-
Step 400
400
#7DA0E2
oklch(70.6% 0.105 262.6)
-
Step 500
500
#5D87D9
oklch(63% 0.133 262.7)
-
Step 600
600 (this color)
#3F6BC2
oklch(54.1% 0.144 262.4)
-
Step 700
700
#355DAC
oklch(49.1% 0.134 262.4)
-
Step 800
800
#2C4C8B
oklch(42.6% 0.111 262.4)
-
Step 900
900
#28406F
oklch(37.7% 0.086 262.6)
-
Step 950
950
#172641
oklch(27% 0.055 261.4)
#3F6BC2 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) | #4074C5 | 0.024 |
| Deuteranopia (no green cones) | #2968C0 | 0.022 |
| Tritanopia (no blue cones) | #007F8D | 0.118 |
| Achromatopsia (no color) | #6E6E6E | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F6BC2
#3F6BC2
oklch(54.1% 0.144 262.4)
- #8F6700
#8F6700
oklch(54.1% 0.111 81.8)
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 #3F6BC2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.032
- French Blue #436BAD ΔE 0.033
- Windows Blue #3778BF ΔE 0.037
- Royal Blue #4169E1 ΔE 0.049
- Flat Blue #3C73A8 ΔE 0.051
- Nice Blue #107AB0 ΔE 0.060
- Dark Periwinkle #665FD1 ΔE 0.060
- Iris #6258C4 ΔE 0.061
Use #3F6BC2 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.