#3965B1
Closest named color: Mid Blue (#276AB3). oklch(51.4% 0.13 260.6), rgb(57, 101, 177).
Aa
White text reads best on this color (5.72:1).
About this color
#3965B1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.130 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.018 away. White text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.67:1 |
| White text | 5.72:1 |
Values
| HEX | #3965B1 |
| RGB | rgb(57, 101, 177) |
| HSL | hsl(218, 51%, 46%) |
| OKLCH | oklch(51.4% 0.13 260.6) |
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 #3965B1 | 5.72:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #3965B1 | 3.67:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #3965B1 text on white | 5.72:1 | AA | Lc 78.3 | Fine for body text |
| #3965B1 text on black | 3.67:1 | AA large text | Lc -23.4 | 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
#AAC2EA
oklch(81% 0.063 260.6)
-
Step 400
400
#7CA1E0
oklch(70.7% 0.102 260.7)
-
Step 500
500
#5B89D7
oklch(63.2% 0.128 260.4)
-
Step 600
600
#4171C4
oklch(55.6% 0.139 260.6)
-
Step 700
700 (this color)
#3965B1
oklch(51.4% 0.13 260.6)
-
Step 800
800
#2A4D89
oklch(42.6% 0.108 260.5)
-
Step 900
900
#26416E
oklch(37.8% 0.084 260.1)
-
Step 950
950
#172640
oklch(27% 0.053 260.8)
#3965B1 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) | #416CB4 | 0.022 |
| Deuteranopia (no green cones) | #2E61AF | 0.016 |
| Tritanopia (no blue cones) | #007782 | 0.107 |
| Achromatopsia (no color) | #666666 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3965B1
#3965B1
oklch(51.4% 0.13 260.6)
- #865F00
#865F00
oklch(51.3% 0.106 80.6)
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 #3965B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.018
- French Blue #436BAD ΔE 0.023
- Flat Blue #3C73A8 ΔE 0.046
- Dusky Blue #475F94 ΔE 0.047
- Muted Blue #3B719F ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.053
- Windows Blue #3778BF ΔE 0.054
- Peacock Blue #016795 ΔE 0.058
Use #3965B1 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.