#3B51AB
Closest named color: Blueberry (#464196). oklch(46.8% 0.146 269.6), rgb(59, 81, 171).
Aa
White text reads best on this color (7.11:1).
About this color
#3B51AB is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.146 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.051 away. White text reads best on it, at 7.11:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.95:1 |
| White text | 7.11:1 |
Values
| HEX | #3B51AB |
| RGB | rgb(59, 81, 171) |
| HSL | hsl(228, 49%, 45%) |
| OKLCH | oklch(46.8% 0.146 269.6) |
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 #3B51AB | 7.11:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #3B51AB | 2.95:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #3B51AB text on white | 7.11:1 | AAA | Lc 84.4 | Fine for body text |
| #3B51AB text on black | 2.95:1 | Fails | Lc -17.6 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CFD9F4
oklch(88.6% 0.039 269.4)
-
Step 300
300
#AEBFEF
oklch(80.8% 0.071 269.6)
-
Step 400
400
#859DE7
oklch(70.7% 0.112 269.7)
-
Step 500
500
#6783E0
oklch(63.2% 0.144 269.4)
-
Step 600
600
#506ACE
oklch(55.6% 0.157 269.7)
-
Step 700
700 (this color)
#3B51AB
oklch(46.8% 0.146 269.6)
-
Step 800
800
#354890
oklch(42.6% 0.121 269.6)
-
Step 900
900
#2E3D73
oklch(37.6% 0.094 269.8)
-
Step 950
950
#1B2443
oklch(26.9% 0.059 269.9)
#3B51AB 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) | #195DAE | 0.038 |
| Deuteranopia (no green cones) | #0053A9 | 0.040 |
| Tritanopia (no blue cones) | #006676 | 0.122 |
| Achromatopsia (no color) | #585858 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B51AB
#3B51AB
oklch(46.8% 0.146 269.6)
- #6F5700
#6F5700
oklch(46.8% 0.096 90.1)
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 #3B51AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.053
- Dusk Blue #26538D ΔE 0.056
- Twilight #4E518B ΔE 0.057
- Dusky Blue #475F94 ΔE 0.061
- Cobalt #1E488F ΔE 0.062
- Blue Blue #2242C7 ΔE 0.065
- Mid Blue #276AB3 ΔE 0.066
Use #3B51AB 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.