#3F68C4
Closest named color: Mid Blue (#276AB3). oklch(53.6% 0.151 264), rgb(63, 104, 196).
Aa
White text reads best on this color (5.26:1).
About this color
#3F68C4 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.151 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.035 away. White text reads best on it, at 5.26:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.98:1 |
| White text | 5.26:1 |
Values
| HEX | #3F68C4 |
| RGB | rgb(63, 104, 196) |
| HSL | hsl(222, 53%, 51%) |
| OKLCH | oklch(53.6% 0.151 264) |
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 #3F68C4 | 5.26:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #3F68C4 | 3.98:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #3F68C4 text on white | 5.26:1 | AA | Lc 75.8 | Fine for body text |
| #3F68C4 text on black | 3.98:1 | AA large text | Lc -25.9 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDDAF3
oklch(88.6% 0.037 263.6)
-
Step 300
300
#AAC1ED
oklch(80.9% 0.067 263.3)
-
Step 400
400
#7EA0E5
oklch(70.8% 0.108 263.8)
-
Step 500
500
#5E86DD
oklch(63.1% 0.139 264.2)
-
Step 600
600 (this color)
#3F68C4
oklch(53.6% 0.151 264)
-
Step 700
700
#365BAF
oklch(49% 0.141 264)
-
Step 800
800
#2D4B8E
oklch(42.7% 0.117 264)
-
Step 900
900
#283F71
oklch(37.6% 0.091 264)
-
Step 950
950
#182542
oklch(26.9% 0.057 264.6)
#3F68C4 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) | #3872C7 | 0.026 |
| Deuteranopia (no green cones) | #1C66C2 | 0.028 |
| Tritanopia (no blue cones) | #007D8C | 0.123 |
| Achromatopsia (no color) | #6C6C6C | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F68C4
#3F68C4
oklch(53.6% 0.151 264)
- #8B6700
#8B6700
oklch(53.6% 0.11 84.4)
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 #3F68C4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.035
- French Blue #436BAD ΔE 0.039
- Royal Blue #4169E1 ΔE 0.045
- Windows Blue #3778BF ΔE 0.045
- Iris #6258C4 ΔE 0.055
- Dark Periwinkle #665FD1 ΔE 0.056
- Warm Blue #4B57DB ΔE 0.057
- Flat Blue #3C73A8 ΔE 0.058
Use #3F68C4 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.