#3964A1
Closest named color: Dusky Blue (#475F94). oklch(50.2% 0.109 257.3), rgb(57, 100, 161).
Aa
White text reads best on this color (5.98:1).
About this color
#3964A1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.109 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.025 away. White text reads best on it, at 5.98:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.51:1 |
| White text | 5.98:1 |
Values
| HEX | #3964A1 |
| RGB | rgb(57, 100, 161) |
| HSL | hsl(215, 48%, 43%) |
| OKLCH | oklch(50.2% 0.109 257.3) |
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 #3964A1 | 5.98:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #3964A1 | 3.51:1 | AA large text | Lc 24.4 | Dividers and decoration only |
| #3964A1 text on white | 5.98:1 | AA | Lc 79.7 | Fine for body text |
| #3964A1 text on black | 3.51:1 | AA large text | Lc -22.1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CDDAED
oklch(88.4% 0.03 257.8)
-
Step 300
300
#ACC2E3
oklch(80.8% 0.053 258.4)
-
Step 400
400
#7FA3D5
oklch(70.8% 0.084 256.7)
-
Step 500
500
#5E8BCA
oklch(63.1% 0.108 256.9)
-
Step 600
600
#4474B7
oklch(55.7% 0.117 257)
-
Step 700
700 (this color)
#3964A1
oklch(50.2% 0.109 257.3)
-
Step 800
800
#2D4F80
oklch(42.7% 0.091 257.6)
-
Step 900
900
#294266
oklch(37.7% 0.069 257.5)
-
Step 950
950
#18273C
oklch(27% 0.044 256.9)
#3964A1 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) | #4969A3 | 0.024 |
| Deuteranopia (no green cones) | #3B5FA0 | 0.014 |
| Tritanopia (no blue cones) | #00727B | 0.089 |
| Achromatopsia (no color) | #636363 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3964A1
#3964A1
oklch(50.2% 0.109 257.3)
- #855B00
#855B00
oklch(50.3% 0.105 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 #3964A1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.025
- French Blue #436BAD ΔE 0.029
- Mid Blue #276AB3 ΔE 0.031
- Denim Blue #3B5B92 ΔE 0.032
- Denim #3B638C ΔE 0.034
- Peacock Blue #016795 ΔE 0.039
- Muted Blue #3B719F ΔE 0.039
- Flat Blue #3C73A8 ΔE 0.043
Use #3964A1 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.