#3E51AB
Closest named color: Blueberry (#464196). oklch(47% 0.145 270.9), rgb(62, 81, 171).
Aa
White text reads best on this color (7.07:1).
About this color
#3E51AB is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.145 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.050 away. White text reads best on it, at 7.07:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.96:1 |
| White text | 7.07:1 |
Values
| HEX | #3E51AB |
| RGB | rgb(62, 81, 171) |
| HSL | hsl(230, 47%, 46%) |
| OKLCH | oklch(47% 0.145 270.9) |
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 #3E51AB | 7.07:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #3E51AB | 2.96:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #3E51AB text on white | 7.07:1 | AAA | Lc 84.2 | Fine for body text |
| #3E51AB 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
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#CFD8F4
oklch(88.4% 0.04 271.4)
-
Step 300
300
#AFBFEF
oklch(80.9% 0.07 270.4)
-
Step 400
400
#869CE7
oklch(70.6% 0.113 270.8)
-
Step 500
500
#6A82E0
oklch(63.1% 0.144 271)
-
Step 600
600
#5369CE
oklch(55.6% 0.157 271.2)
-
Step 700
700 (this color)
#3E51AB
oklch(47% 0.145 270.9)
-
Step 800
800
#374890
oklch(42.7% 0.12 270.6)
-
Step 900
900
#2F3D73
oklch(37.7% 0.094 270.4)
-
Step 950
950
#1C2443
oklch(27% 0.059 271.1)
#3E51AB 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) | #1A5DAE | 0.040 |
| Deuteranopia (no green cones) | #0054A9 | 0.043 |
| Tritanopia (no blue cones) | #006676 | 0.123 |
| Achromatopsia (no color) | #585858 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E51AB
#3E51AB
oklch(47% 0.145 270.9)
- #6F5800
#6F5800
oklch(47% 0.096 91.1)
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 #3E51AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.050
- Denim Blue #3B5B92 ΔE 0.053
- Twilight #4E518B ΔE 0.056
- Dusk Blue #26538D ΔE 0.057
- Dusky Blue #475F94 ΔE 0.060
- Cobalt #1E488F ΔE 0.064
- Mid Blue #276AB3 ΔE 0.067
- Blue Blue #2242C7 ΔE 0.067
Use #3E51AB 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.