#3A51AE
Closest named color: Blueberry (#464196). oklch(47% 0.151 269.4), rgb(58, 81, 174).
Aa
White text reads best on this color (7.07:1).
About this color
#3A51AE is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.151 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.054 away. White text reads best on it, at 7.07:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.96:1 |
| White text | 7.07:1 |
Values
| HEX | #3A51AE |
| RGB | rgb(58, 81, 174) |
| HSL | hsl(228, 50%, 45%) |
| OKLCH | oklch(47% 0.151 269.4) |
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 #3A51AE | 7.07:1 | AAA | Lc -89.1 | Fine for body text |
| Black text on #3A51AE | 2.96:1 | Fails | Lc 19.9 | Dividers and decoration only |
| #3A51AE text on white | 7.07:1 | AAA | Lc 84.2 | Fine for body text |
| #3A51AE text on black | 2.96:1 | Fails | Lc -17.8 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED9F5
oklch(88.6% 0.04 268.5)
-
Step 300
300
#ADBFF1
oklch(80.8% 0.074 269.3)
-
Step 400
400
#839DEA
oklch(70.8% 0.117 269.1)
-
Step 500
500
#6682E3
oklch(63.1% 0.149 269.6)
-
Step 600
600
#4E6AD1
oklch(55.7% 0.162 269.2)
-
Step 700
700 (this color)
#3A51AE
oklch(47% 0.151 269.4)
-
Step 800
800
#344892
oklch(42.7% 0.124 269.2)
-
Step 900
900
#2D3D75
oklch(37.7% 0.098 269.3)
-
Step 950
950
#1A2444
oklch(26.9% 0.061 268.9)
#3A51AE 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) | #135EB1 | 0.041 |
| Deuteranopia (no green cones) | #0053AC | 0.038 |
| Tritanopia (no blue cones) | #006777 | 0.125 |
| Achromatopsia (no color) | #585858 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A51AE
#3A51AE
oklch(47% 0.151 269.4)
- #705700
#705700
oklch(46.9% 0.096 89.3)
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 #3A51AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.054
- Denim Blue #3B5B92 ΔE 0.057
- Dusk Blue #26538D ΔE 0.059
- Blue Blue #2242C7 ΔE 0.061
- Twilight #4E518B ΔE 0.062
- Dusky Blue #475F94 ΔE 0.064
- Cobalt #1E488F ΔE 0.065
- Mid Blue #276AB3 ΔE 0.066
Use #3A51AE 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.