#3F15D2
Closest named color: Violet Blue (#510AC9). oklch(42.7% 0.25 277.4), rgb(63, 21, 210).
Aa
White text reads best on this color (9.33:1).
About this color
#3F15D2 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.250 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Violet Blue (#510AC9), ΔE 0.038 away. White text reads best on it, at 9.33:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.250) |
| Temperature | cool |
| Nearest name | Violet Blue (#510AC9) |
| Black text | 2.24:1 |
| White text | 9.33:1 |
Values
| HEX | #3F15D2 |
| RGB | rgb(63, 21, 210) |
| HSL | hsl(253, 82%, 45%) |
| OKLCH | oklch(42.7% 0.25 277.4) |
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 #3F15D2 | 9.33:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #3F15D2 | 2.24:1 | Fails | Lc 14.4 | Not readable |
| #3F15D2 text on white | 9.33:1 | AAA | Lc 89.6 | Fine for body text |
| #3F15D2 text on black | 2.24:1 | Fails | Lc -12.7 | Not readable |
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 800.
-
Step 50
50
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E8FF
oklch(93.5% 0.031 277.9)
-
Step 200
200
#CFD6FF
oklch(88.4% 0.057 277.5)
-
Step 300
300
#B1BBFF
oklch(80.9% 0.097 277.5)
-
Step 400
400
#8A95FF
oklch(70.7% 0.154 277.2)
-
Step 500
500
#7075FF
oklch(63.1% 0.201 277.4)
-
Step 600
600
#5B50FF
oklch(55.7% 0.248 277.4)
-
Step 700
700
#4E16FF
oklch(49.1% 0.292 277.5)
-
Step 800
800 (this color)
#3F15D2
oklch(42.7% 0.25 277.4)
-
Step 900
900
#3321A5
oklch(37.7% 0.196 277.6)
-
Step 950
950
#1C1760
oklch(26.9% 0.123 277.2)
#3F15D2 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) | #004ED7 | 0.090 |
| Deuteranopia (no green cones) | #003FCF | 0.068 |
| Tritanopia (no blue cones) | #00587C | 0.193 |
| Achromatopsia (no color) | #474747 | 0.252 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F15D2
#3F15D2
oklch(42.7% 0.25 277.4)
- #5C4F00
#5C4F00
oklch(42.8% 0.088 98.3)
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 #3F15D2, closest first.
No curated palette has a color within ΔE 0.04 of #3F15D2.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Violet Blue #510AC9 ΔE 0.038
- Majorelle Blue #3F37C9 ΔE 0.043
- Indigo Blue #3A18B1 ΔE 0.054
- Ultramarine Blue #1805DB ΔE 0.057
- Purple Blue #5D21D0 ΔE 0.059
- Blue Purple #5A06EF ΔE 0.064
- Blurple #5539CC ΔE 0.065
- Blue Blue #2242C7 ΔE 0.065
Use #3F15D2 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.