#3756A3
Closest named color: Denim Blue (#3B5B92). oklch(47.1% 0.129 265.3), rgb(55, 86, 163).
Aa
White text reads best on this color (6.94:1).
About this color
#3756A3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.129 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.034 away. White text reads best on it, at 6.94:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.02:1 |
| White text | 6.94:1 |
Values
| HEX | #3756A3 |
| RGB | rgb(55, 86, 163) |
| HSL | hsl(223, 50%, 43%) |
| OKLCH | oklch(47.1% 0.129 265.3) |
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 #3756A3 | 6.94:1 | AA | Lc -88.7 | Fine for body text |
| Black text on #3756A3 | 3.02:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #3756A3 text on white | 6.94:1 | AA | Lc 83.8 | Fine for body text |
| #3756A3 text on black | 3.02:1 | AA large text | Lc -18.2 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CED9F1
oklch(88.4% 0.035 266)
-
Step 300
300
#ADC1EA
oklch(81% 0.062 264.6)
-
Step 400
400
#829FE0
oklch(70.6% 0.101 265.5)
-
Step 500
500
#6386D7
oklch(63% 0.129 265.2)
-
Step 600
600
#4B6EC4
oklch(55.5% 0.14 265.4)
-
Step 700
700 (this color)
#3756A3
oklch(47.1% 0.129 265.3)
-
Step 800
800
#324B89
oklch(42.6% 0.107 265.6)
-
Step 900
900
#2C3F6E
oklch(37.6% 0.084 265.9)
-
Step 950
950
#1A2540
oklch(26.9% 0.053 266.2)
#3756A3 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) | #2F5FA6 | 0.024 |
| Deuteranopia (no green cones) | #1A55A1 | 0.026 |
| Tritanopia (no blue cones) | #006874 | 0.109 |
| Achromatopsia (no color) | #5A5A5A | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3756A3
#3756A3
oklch(47.1% 0.129 265.3)
- #745600
#745600
oklch(47.2% 0.097 85)
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 #3756A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.034
- Dusk Blue #26538D ΔE 0.041
- Dusky Blue #475F94 ΔE 0.044
- Twilight #4E518B ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.049
- Mid Blue #276AB3 ΔE 0.056
- Blueberry #464196 ΔE 0.057
- Cobalt #1E488F ΔE 0.058
Use #3756A3 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.