#3768C0
Closest named color: Mid Blue (#276AB3). oklch(53% 0.148 261.1), rgb(55, 104, 192).
Aa
White text reads best on this color (5.37:1).
About this color
#3768C0 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.148 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.026 away. White text reads best on it, at 5.37:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.90:1 |
| White text | 5.37:1 |
Values
| HEX | #3768C0 |
| RGB | rgb(55, 104, 192) |
| HSL | hsl(219, 55%, 48%) |
| OKLCH | oklch(53% 0.148 261.1) |
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 #3768C0 | 5.37:1 | AA | Lc -81.8 | Fine for body text |
| Black text on #3768C0 | 3.90:1 | AA large text | Lc 27.6 | Dividers and decoration only |
| #3768C0 text on white | 5.37:1 | AA | Lc 76.5 | Fine for body text |
| #3768C0 text on black | 3.90:1 | AA large text | Lc -25.3 | 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
#CCDAF2
oklch(88.5% 0.036 261.3)
-
Step 300
300
#A9C2EC
oklch(81% 0.066 260.7)
-
Step 400
400
#7BA1E3
oklch(70.8% 0.106 261.1)
-
Step 500
500
#5988DB
oklch(63.1% 0.136 261)
-
Step 600
600 (this color)
#3768C0
oklch(53% 0.148 261.1)
-
Step 700
700
#315DAE
oklch(49.1% 0.138 261.4)
-
Step 800
800
#294D8C
oklch(42.8% 0.113 260.7)
-
Step 900
900
#254070
oklch(37.6% 0.089 261.1)
-
Step 950
950
#162642
oklch(27% 0.057 260.9)
#3768C0 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) | #3B71C3 | 0.025 |
| Deuteranopia (no green cones) | #1E65BE | 0.022 |
| Tritanopia (no blue cones) | #007D8A | 0.119 |
| Achromatopsia (no color) | #6A6A6A | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3768C0
#3768C0
oklch(53% 0.148 261.1)
- #8C6400
#8C6400
oklch(53.1% 0.11 81.1)
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 #3768C0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.026
- French Blue #436BAD ΔE 0.034
- Windows Blue #3778BF ΔE 0.045
- Royal Blue #4169E1 ΔE 0.053
- Flat Blue #3C73A8 ΔE 0.054
- Nice Blue #107AB0 ΔE 0.062
- Iris #6258C4 ΔE 0.062
- Muted Blue #3B719F ΔE 0.063
Use #3768C0 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.