#3B51D2
Closest named color: Warm Blue (#4B57DB). oklch(50% 0.199 270), rgb(59, 81, 210).
Aa
White text reads best on this color (6.37:1).
About this color
#3B51D2 is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.199 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.029 away. White text reads best on it, at 6.37:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.29:1 |
| White text | 6.37:1 |
Values
| HEX | #3B51D2 |
| RGB | rgb(59, 81, 210) |
| HSL | hsl(231, 63%, 53%) |
| OKLCH | oklch(50% 0.199 270) |
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 #3B51D2 | 6.37:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #3B51D2 | 3.29:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #3B51D2 text on white | 6.37:1 | AA | Lc 81.1 | Fine for body text |
| #3B51D2 text on black | 3.29:1 | AA large text | Lc -20.8 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2E9FD
oklch(93.5% 0.028 270.4)
-
Step 200
200
#CBD8FE
oklch(88.5% 0.054 270.4)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5D7CFF
oklch(63.2% 0.197 269.9)
-
Step 600
600
#4760EE
oklch(55.6% 0.214 270.2)
-
Step 700
700 (this color)
#3B51D2
oklch(50% 0.199 270)
-
Step 800
800
#2F41A7
oklch(42.7% 0.164 270.2)
-
Step 900
900
#293984
oklch(37.8% 0.127 270.1)
-
Step 950
950
#18224E
oklch(27.1% 0.082 270.4)
#3B51D2 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) | #0066D6 | 0.053 |
| Deuteranopia (no green cones) | #0058D0 | 0.036 |
| Tritanopia (no blue cones) | #00728A | 0.158 |
| Achromatopsia (no color) | #5F5F5F | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B51D2
#3B51D2
oklch(50% 0.199 270)
- #7A6000
#7A6000
oklch(50.1% 0.102 90.2)
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 #3B51D2, closest first.
No curated palette has a color within ΔE 0.04 of #3B51D2.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.029
- Blue Blue #2242C7 ΔE 0.050
- Azul #1D5DEC ΔE 0.050
- Blue With A Hint Of Purple #533CC6 ΔE 0.054
- Majorelle Blue #3F37C9 ΔE 0.055
- Blurple #5539CC ΔE 0.056
- Neon Blue #4361EE ΔE 0.058
- Iris #6258C4 ΔE 0.062
Use #3B51D2 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.