#3765B0
Closest named color: Mid Blue (#276AB3). oklch(51.3% 0.13 259.7), rgb(55, 101, 176).
Aa
White text reads best on this color (5.75:1).
About this color
#3765B0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.130 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.017 away. White text reads best on it, at 5.75:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.65:1 |
| White text | 5.75:1 |
Values
| HEX | #3765B0 |
| RGB | rgb(55, 101, 176) |
| HSL | hsl(217, 52%, 45%) |
| OKLCH | oklch(51.3% 0.13 259.7) |
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 #3765B0 | 5.75:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #3765B0 | 3.65:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #3765B0 text on white | 5.75:1 | AA | Lc 78.5 | Fine for body text |
| #3765B0 text on black | 3.65:1 | AA large text | Lc -23.3 | 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 700.
-
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
#CCDAF1
oklch(88.5% 0.035 260.4)
-
Step 300
300
#A9C2EA
oklch(80.9% 0.063 259.7)
-
Step 400
400
#7BA2DF
oklch(70.8% 0.1 259.1)
-
Step 500
500
#5989D6
oklch(63.1% 0.128 259.5)
-
Step 600
600
#3F71C4
oklch(55.6% 0.14 260)
-
Step 700
700 (this color)
#3765B0
oklch(51.3% 0.13 259.7)
-
Step 800
800
#294E89
oklch(42.8% 0.107 259.4)
-
Step 900
900
#26416D
oklch(37.7% 0.083 259.7)
-
Step 950
950
#162640
oklch(26.9% 0.053 259.7)
#3765B0 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) | #426CB3 | 0.024 |
| Deuteranopia (no green cones) | #2E61AE | 0.015 |
| Tritanopia (no blue cones) | #007682 | 0.103 |
| Achromatopsia (no color) | #666666 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3765B0
#3765B0
oklch(51.3% 0.13 259.7)
- #875E00
#875E00
oklch(51.2% 0.106 79)
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 #3765B0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.017
- French Blue #436BAD ΔE 0.023
- Flat Blue #3C73A8 ΔE 0.045
- Dusky Blue #475F94 ΔE 0.046
- Muted Blue #3B719F ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.051
- Windows Blue #3778BF ΔE 0.054
- Peacock Blue #016795 ΔE 0.056
Use #3765B0 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.