#3769B1
Closest named color: Mid Blue (#276AB3). oklch(52.2% 0.126 257.7), rgb(55, 105, 177).
Aa
White text reads best on this color (5.50:1).
About this color
#3769B1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.126 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.012 away. White text reads best on it, at 5.50:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.81:1 |
| White text | 5.50:1 |
Values
| HEX | #3769B1 |
| RGB | rgb(55, 105, 177) |
| HSL | hsl(215, 53%, 45%) |
| OKLCH | oklch(52.2% 0.126 257.7) |
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 #3769B1 | 5.50:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #3769B1 | 3.81:1 | AA large text | Lc 26.9 | Dividers and decoration only |
| #3769B1 text on white | 5.50:1 | AA | Lc 77.2 | Fine for body text |
| #3769B1 text on black | 3.81:1 | AA large text | Lc -24.6 | 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 700.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF6
oklch(93.7% 0.017 256.3)
-
Step 200
200
#CCDAF0
oklch(88.5% 0.034 259.4)
-
Step 300
300
#A8C2E9
oklch(80.8% 0.062 258.4)
-
Step 400
400
#7AA2DD
oklch(70.6% 0.098 258)
-
Step 500
500
#578AD4
oklch(63.1% 0.125 257.7)
-
Step 600
600
#3C73C1
oklch(55.7% 0.135 257.5)
-
Step 700
700 (this color)
#3769B1
oklch(52.2% 0.126 257.7)
-
Step 800
800
#274E87
oklch(42.6% 0.105 258)
-
Step 900
900
#24426C
oklch(37.8% 0.081 257.1)
-
Step 950
950
#16273F
oklch(27.1% 0.05 257.1)
#3769B1 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) | #486FB4 | 0.026 |
| Deuteranopia (no green cones) | #3564B0 | 0.014 |
| Tritanopia (no blue cones) | #007A84 | 0.102 |
| Achromatopsia (no color) | #696969 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3769B1
#3769B1
oklch(52.2% 0.126 257.7)
- #8C6000
#8C6000
oklch(52.3% 0.109 77.5)
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 #3769B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.012
- French Blue #436BAD ΔE 0.015
- Flat Blue #3C73A8 ΔE 0.035
- Muted Blue #3B719F ΔE 0.041
- Windows Blue #3778BF ΔE 0.044
- Dusky Blue #475F94 ΔE 0.050
- Nice Blue #107AB0 ΔE 0.050
- Ocean Blue #03719C ΔE 0.052
Use #3769B1 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.